THÔNG TIN CHI TIẾT ĐỀ THI
Logo thi24h.vn
ĐỀ THI Toán học
Số câu hỏi: 50
Thời gian làm bài: 90 phút
Mã đề: #942
Lĩnh vực: Toán học
Nhóm: Toán 12 - Mũ và Logarit
Lệ phí: Miễn phí
Lượt thi: 3017

Ôn tập trắc nghiệm Hàm số lũy thừa Toán Lớp 12 Phần 5

Câu 1

Cho hai số thực x,y thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaadIhadaahaaadbeqaaiaaikdaaaWccqGH % RaWkcaWG5bWaaWbaaWqabeaacaaIYaaaaSGaey4kaSIaaGOmaaqaba % GcdaqadaqaaiaadIhacqGHRaWkcaWG5bGaey4kaSIaaG4maaGaayjk % aiaawMcaaiabgwMiZkaaigdaaaa!47E5! {\log _{{x^2} + {y^2} + 2}}\left( {x + y + 3} \right) \ge 1\). Tìm giá trị lớn nhất của biểu thức S = 3x +4y -6.

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aWaaOaaaeaacaaI2aaaleqaaOGaeyOeI0IaaGyoaaqaaiaaikda % aaaaaa!3A14! \frac{{5\sqrt 6 - 9}}{2}\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aWaaOaaaeaacaaI2aaaleqaaOGaeyOeI0IaaG4maaqaaiaaikda % aaaaaa!3A0E! \frac{{5\sqrt 6 - 3}}{2}\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aWaaOaaaeaacaaIZaaaleqaaOGaeyOeI0IaaGynaaqaaiaaikda % aaaaaa!3A0D! \frac{{5\sqrt 3 - 5}}{2}\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI1aWaaOaaaeaacaaI2aaaleqaaOGaeyOeI0IaaGynaaqaaiaaikda % aaaaaa!3A10! \frac{{5\sqrt 6 - 5}}{2}\)
Câu 2

Cho hai số thực x,y thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEamaaCa % aaleqabaGaaGOmaaaakiabgUcaRiaadMhadaahaaWcbeqaaiaaikda % aaGccqGH+aGpcaaIXaaaaa!3C7A! {x^2} + {y^2} > 1\) và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaadIhadaahaaadbeqaaiaaikdaaaWccqGH % RaWkcaaIYaGaamyEamaaCaaameqabaGaaGOmaaaaaSqabaGcdaqada % qaaiaaikdacaWG4bGaey4kaSIaamyEaaGaayjkaiaawMcaaiabgwMi % Zkaaigdaaaa!4620! {\log _{{x^2} + 2{y^2}}}\left( {2x + y} \right) \ge 1\). Biết giá trị lớn nhất của P = x+y là \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGHbGaey4kaSIaamOyamaakaaabaGaaGOnaaWcbeaaaOqaaiaadoga % aaaaaa!3A80! \frac{{a + b\sqrt 6 }}{c}\) với a,b,c là các số nguyên dương và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % WGHbaabaGaam4yaaaaaaa!37D2! \frac{a}{c}\) tối giản. Tính S = a+ b+ c

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIXaGaaG4naaWcbeaaaaa!378B! \sqrt {17} \)
B.
\(\sqrt {15}\)
C.
\(\sqrt {19}\)
D.
12
Câu 3

Số thực a nhỏ nhất để bất đẳng thức \(ln(1+x)\ge x - ax^2\) luôn đúng với mọi số thực dương x là \(\frac{m}{n}\) với m,n là các số nguyên dương và \(\frac{m}{n}\) tối giản. Tính

T = 2m+3n.

A.
T = 5
B.
T = 7
C.
T = 8
D.
T = 11
Câu 4

Tất cả các giá trị thực của m để bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEamaaka % aabaGaamiEaaWcbeaakiabgUcaRmaakaaabaGaamiEaiabgUcaRiaa % igdacaaIYaaaleqaaOGaeyizImQaamyBaiaac6caciGGSbGaai4Bai % aacEgadaWgaaWcbaGaaGynaiabgkHiTmaakaaabaGaaGinaiabgkHi % TiaadIhaaWqabaaaleqaaOGaaG4maaaa!4807! x\sqrt x + \sqrt {x + 12} \le m.{\log _{5 - \sqrt {4 - x} }}3\) có nghiệm là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabg6 % da+iaaikdadaGcaaqaaiaaiodaaSqabaaaaa!3982! m > 2\sqrt 3 \)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgw % MiZkaaikdadaGcaaqaaiaaiodaaSqabaaaaa!3A40! m \ge 2\sqrt 3 \)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabg6 % da+iaaigdacaaIYaGaciiBaiaac+gacaGGNbWaaSbaaSqaaiaaioda % aeqaaOGaaGynaaaa!3DE7! m > 12{\log _3}5\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmaiabgY % da8iaad2gacqGH8aapcaaIXaGaaGOmaiGacYgacaGGVbGaai4zamaa % BaaaleaacaaIYaaabeaakiaaiwdaaaa!3FA2! 2 < m < 12{\log _2}5\)
Câu 5

Trong tất cả các cặp (x;y) thỏa mãn \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaadIhadaahaaadbeqaaiaaikdaaaWccqGH % RaWkcaWG5bWaaWbaaWqabeaacaaIYaaaaSGaey4kaSIaaGOmaaqaba % GcdaqadaqaaiaaisdacaWG4bGaey4kaSIaaGinaiaadMhacqGHsisl % caaI0aaacaGLOaGaayzkaaGaeyyzImRaaGymaaaa!496D! {\log _{{x^2} + {y^2} + 2}}\left( {4x + 4y - 4} \right) \ge 1\). Tìm m để tồn tại duy nhất cặp (x,y) sao cho \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEamaaCa % aaleqabaGaaGOmaaaakiabgUcaRiaadMhadaahaaWcbeqaaiaaikda % aaGccqGHRaWkcaaIYaGaamiEaiabgkHiTiaaikdacaWG5bGaey4kaS % IaaGOmaiabgkHiTiaad2gacqGH9aqpcaaIWaaaaa!4536! {x^2} + {y^2} + 2x - 2y + 2 - m = 0\).

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % GcaaqaaiaaigdacaaIWaaaleqaaOGaeyOeI0YaaOaaaeaacaaIYaaa % leqaaaGccaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaaaa!3BCE! {\left( {\sqrt {10} - \sqrt 2 } \right)^2}\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIXaGaaGimaaWcbeaakiabgkHiTmaakaaabaGaaGOmaaWcbeaaaaa!3951! \sqrt {10} - \sqrt 2 \) và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIXaGaaGimaaWcbeaakiabgkHiTmaakaaabaGaaGOmaaWcbeaaaaa!3951! \sqrt {10} + \sqrt 2 \)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % GcaaqaaiaaigdacaaIWaaaleqaaOGaeyOeI0YaaOaaaeaacaaIYaaa % leqaaaGccaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaaaa!3BCD! {\left( {\sqrt {10} - \sqrt 2 } \right)^2}\) và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % GcaaqaaiaaigdacaaIWaaaleqaaOGaeyOeI0YaaOaaaeaacaaIYaaa % leqaaaGccaGLOaGaayzkaaWaaWbaaSqabeaacaaIYaaaaaaa!3BCD! {\left( {\sqrt {10} + \sqrt 2 } \right)^2}\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca % aIXaGaaGimaaWcbeaakiabgkHiTmaakaaabaGaaGOmaaWcbeaaaaa!3952! \sqrt {10} - \sqrt 2 \)
Câu 6

Trong các nghiệm ( x ; y ) thỏa mãn bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaadIhadaahaaadbeqaaiaaikdaaaWccqGH % RaWkcaaIYaGaamyEamaaCaaameqabaGaaGOmaaaaaSqabaGccaGGOa % GaaGOmaiaadIhacqGHRaWkcaWG5bGaaiykaiabgwMiZkaaigdaaaa!45EF! {\log _{{x^2} + 2{y^2}}}(2x + y) \ge 1\). Giá trị lớn nhất của biểu thức T = 2x + y bằng:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aI5aaabaGaaGinaaaaaaa!3784! \frac{9}{4}\)
B.
\(\frac{9}{2}\)
C.
\(\frac{9}{8}\)
D.
9
Câu 7

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIYaWaaWbaaSqabeaacaWG4bWaaWbaaWqabeaacaaIYaaaaSGaeyOe % I0IaaGinaaaakiabgkHiTiaaigdaaiaawIcacaGLPaaacaGGUaGaci % iBaiaac6gacaWG4bWaaWbaaSqabeaacaaIYaaaaOGaeyipaWJaaGim % aaaa!43F9! \left( {{2^{{x^2} - 4}} - 1} \right).\ln {x^2} < 0\) là

A.
[1 ; 2]
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcaaIYaGaai4oaiabgkHiTiaaigdaaiaawIcacaGLPaaacqGH % QicYcaGGOaGaaGymaiaacUdacaaIYaGaaiykaaaa!40BC! \left( { - 2; - 1} \right) \cup (1;2)\)
C.
{1;2}
D.
(1;2)
Câu 8

Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciyBaiaacg % gacaGG4bWaaiWaaeaaciGGSbGaai4BaiaacEgadaWgaaWcbaGaaG4m % aaqabaGccaWG4bGaai4oaiGacYgacaGGVbGaai4zamaaBaaaleaada % WcaaqaaiaaigdaaeaacaaIYaaaaaqabaGccaWG4baacaGL7bGaayzF % aaGaeyipaWJaaG4maaaa!47C3! \max \left\{ {{{\log }_3}x;{{\log }_{\frac{1}{2}}}x} \right\} < 3\) có tập nghiệm là.

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislqaaaaaaaaaWdbiabg6HiLkaacUdacaaIYaGaaG4naaWdaiaa % wIcacaGLPaaaaaa!3C45! \left( { - \infty ;27} \right)\)
B.
(8;27)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaqa % aaaaaaaaWdbmaalaaabaGaaGymaaqaaiaaiIdaaaGaai4oaiaaikda % caaI3aaapaGaayjkaiaawMcaaaaa!3B74! \left( {\frac{1}{8};27} \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaqa % aaaaaaaaWdbiaaikdacaaI3aGaai4oaiabgUcaRiabg6HiLcWdaiaa % wIcacaGLPaaaaaa!3C3A! \left( {27; + \infty } \right)\)
Câu 9

Tìm tập xác định hàm số sau \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9maakaaabaGaciiBaiaa % c+gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabe % aakmaalaaabaGaaG4maiabgkHiTiaaikdacaqG4bGaeyOeI0IaamiE % amaaCaaaleqabaGaaGOmaaaaaOqaaiaadIhacqGHRaWkcaaIXaaaaa % Wcbeaaaaa!47FA! f\left( x \right) = \sqrt {{{\log }_{\frac{1}{2}}}\frac{{3 - 2{\rm{x}} - {x^2}}}{{x + 1}}} \)

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maajadabaGaeyOeI0IaeyOhIuQaai4oaiaabccacaaMc8+aaSaa % aeaacqGHsislcaaIZaGaeyOeI0YaaOaaaeaacaaIXaGaaG4naaWcbe % aaaOqaaiaaikdaaaaacaGLOaGaayzxaaGaeyOkIG8aaKGeaeaadaWc % aaqaaiabgkHiTiaaiodacqGHRaWkdaGcaaqaaiaaigdacaaI3aaale % qaaaGcbaGaaGOmaaaacaGG7aGaey4kaSIaeyOhIukacaGLBbGaayzk % aaaaaa!4F81! D = \left( { - \infty ;{\rm{ }}\,\frac{{ - 3 - \sqrt {17} }}{2}} \right] \cup \left[ {\frac{{ - 3 + \sqrt {17} }}{2}; + \infty } \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maabmaabaGaeyOeI0IaeyOhIuQaai4oaiabgkHiTiaaiodaaiaa % wIcacaGLPaaacqGHQicYdaqadaqaaiaaigdacaGG7aGaaGPaVlabgU % caRiabg6HiLcGaayjkaiaawMcaaaaa!4693! D = \left( { - \infty ; - 3} \right) \cup \left( {1;\, + \infty } \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maabmaabaWaaSaaaeaacqGHsislcaaIZaGaeyOeI0YaaOaaaeaa % caaIXaGaaG4naaWcbeaaaOqaaiaaikdaaaGaai4oaiabgkHiTiaaio % daaiaawIcacaGLPaaacqGHQicYdaqadaqaamaalaaabaGaeyOeI0Ia % aG4maiabgUcaRmaakaaabaGaaGymaiaaiEdaaSqabaaakeaacaaIYa % aaaiaacUdacaqGGaGaaGymaaGaayjkaiaawMcaaaaa!4AF7! D = \left( {\frac{{ - 3 - \sqrt {17} }}{2}; - 3} \right) \cup \left( {\frac{{ - 3 + \sqrt {17} }}{2};{\rm{ }}1} \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiraiabg2 % da9maajibabaWaaSaaaeaacqGHsislcaaIZaGaeyOeI0YaaOaaaeaa % caaIXaGaaG4naaWcbeaaaOqaaiaaikdaaaGaai4oaiabgkHiTiaaio % daaiaawUfacaGLPaaacqGHQicYdaqcsaqaamaalaaabaGaeyOeI0Ia % aG4maiabgUcaRmaakaaabaGaaGymaiaaiEdaaSqabaaakeaacaaIYa % aaaiaacUdacaqGGaGaaGymaaGaay5waiaawMcaaaaa!4B8B! D = \left[ {\frac{{ - 3 - \sqrt {17} }}{2}; - 3} \right) \cup \left[ {\frac{{ - 3 + \sqrt {17} }}{2};{\rm{ }}1} \right)\)
Câu 10

Gọi \(S_1,S_2,S_3\) lần lượt là tập nghiệm của các bất phương trình sau: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGOmamaaCa % aaleqabaGaamiEaaaakiabgUcaRiaaikdacaGGUaGaaG4mamaaCaaa % leqabaGaamiEaaaakiabgkHiTiaaiwdadaahaaWcbeqaaiaadIhaaa % GccqGHRaWkcaaIZaGaeyOpa4JaaGimaaaa!4265! {2^x} + {2.3^x} - {5^x} + 3 > 0\) \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaikdaaeqaaOWaaeWaaeaacaWG4bGaey4k % aSIaaGOmaaGaayjkaiaawMcaaiabgsMiJkabgkHiTiaaikdaaaa!4137! ;{\log _2}\left( {x + 2} \right) \le - 2\) \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % WcaaqaaiaaigdaaeaadaGcaaqaaiaaiwdaaSqabaGccqGHsislcaaI % XaaaaaGaayjkaiaawMcaamaaCaaaleqabaGaamiEaaaakiabg6da+i % aaigdaaaa!3DCA! ; {\left( {\frac{1}{{\sqrt 5 - 1}}} \right)^x} > 1\).Tìm khẳng định đúng?

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uamaaBa % aaleaacaaIXaaabeaakiabgkOimlaadofadaWgaaWcbaGaaG4maaqa % baGccqGHckcZcaWGtbWaaSbaaSqaaiaaikdaaeqaaaaa!3F3F! {S_1} \subset {S_3} \subset {S_2}\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uamaaBa % aaleaacaaIYaaabeaakiabgkOimlaadofadaWgaaWcbaGaaGymaaqa % baGccqGHckcZcaWGtbWaaSbaaSqaaiaaiodaaeqaaaaa!3F3F! {S_2} \subset {S_1} \subset {S_3}\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uamaaBa % aaleaacaaIXaaabeaakiabgkOimlaadofadaWgaaWcbaGaaGOmaaqa % baGccqGHckcZcaWGtbWaaSbaaSqaaiaaiodaaeqaaaaa!3F3F! {S_1} \subset {S_2} \subset {S_3}\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uamaaBa % aaleaacaaIYaaabeaakiabgkOimlaadofadaWgaaWcbaGaaG4maaqa % baGccqGHckcZcaWGtbWaaSbaaSqaaiaaigdaaeqaaaaa!3F3F! {S_2} \subset {S_3} \subset {S_1}\)
Câu 11

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac6 % gadaWadaqaamaabmaabaGaamiEaiabgUcaRiaaigdaaiaawIcacaGL % PaaadaqadaqaaiaadIhacqGHsislcaaIYaaacaGLOaGaayzkaaWaae % WaaeaacaWG4bGaeyOeI0IaaG4maaGaayjkaiaawMcaaiabgUcaRiaa % igdaaiaawUfacaGLDbaacqGH+aGpcaaIWaaaaa!49AB! \ln \left[ {\left( {x + 1} \right)\left( {x - 2} \right)\left( {x - 3} \right) + 1} \right] > 0\) là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIXaGaai4oaiaaikdaaiaawIcacaGLPaaacqGHPiYXdaqadaqaaiaa % iodacaGG7aGaey4kaSIaeyOhIukacaGLOaGaayzkaaaaaa!40A9! \left( {1;2} \right) \cap \left( {3; + \infty } \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaaGymaaGaayjkaiaawMcaaiabgQIiipaa % bmaabaGaaGOmaiaacUdacaaIZaaacaGLOaGaayzkaaaaaa!40B6! \left( { - \infty ;1} \right) \cup \left( {2;3} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaaGymaaGaayjkaiaawMcaaiabgMIihpaa % bmaabaGaaGOmaiaacUdacaaIZaaacaGLOaGaayzkaaaaaa!40B4! \left( { - \infty ;1} \right) \cap \left( {2;3} \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIXaGaai4oaiaaikdaaiaawIcacaGLPaaacqGHQicYdaqadaqaaiaa % iodacaGG7aGaey4kaSIaeyOhIukacaGLOaGaayzkaaaaaa!40AB! \left( {1;2} \right) \cup \left( {3; + \infty } \right)\)
Câu 12

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac6 % gadaWadaqaamaabmaabaGaamiEaiabgkHiTiaaigdaaiaawIcacaGL % PaaadaqadaqaaiaadIhacqGHsislcaaIYaaacaGLOaGaayzkaaWaae % WaaeaacaWG4bGaeyOeI0IaaG4maaGaayjkaiaawMcaaiabgUcaRiaa % igdaaiaawUfacaGLDbaacqGH+aGpcaaIWaaaaa!49B6! \ln \left[ {\left( {x - 1} \right)\left( {x - 2} \right)\left( {x - 3} \right) + 1} \right] > 0\) là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIXaGaai4oaiaaikdaaiaawIcacaGLPaaacqGHQicYdaqadaqaaiaa % iodacaGG7aGaey4kaSIaeyOhIukacaGLOaGaayzkaaGaaiOlaaaa!415D! \left( {1;2} \right) \cup \left( {3; + \infty } \right).\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq% GHsislcqGHEisPcaGG7aGaaGymaaGaayjkaiaawMcaaiabgMIihpaa % bmaabaGaaGOmaiaacUdacaaIZaaacaGLOaGaayzkaaGaaiOlaaaa!4166! \left( { - \infty ;1} \right) \cap \left( {2;3} \right).\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aIXaGaai4oaiaaikdaaiaawIcacaGLPaaacqGHPiYXdaqadaqaaiaa % iodacaGG7aGaey4kaSIaeyOhIukacaGLOaGaayzkaaGaaiOlaaaa!415B! \left( {1;2} \right) \cap \left( {3; + \infty } \right).\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaaGymaaGaayjkaiaawMcaaiabgQIiipaa % bmaabaGaaGOmaiaacUdacaaIZaaacaGLOaGaayzkaaGaaiOlaaaa!4168! \left( { - \infty ;1} \right) \cup \left( {2;3} \right).\)
Câu 13

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaalaaabaGaamiEaiabgUcaRiaaikdaaeaacaaIZaGaeyOeI0IaaG % OmaiaadIhaaaGaeyyzImRaaGimaaaa!430F! {\log _{\frac{1}{2}}}\frac{{x + 2}}{{3 - 2x}} \ge 0\) là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg2 % da9maadmaabaWaaSaaaeaacaaIZaaabaGaaGOmaaaacaGG7aGaey4k % aSIaeyOhIukacaGLBbGaayzxaaaaaa!3E60! T = \left[ {\frac{3}{2}; + \infty } \right]\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg2 % da9maadmaabaGaeyOeI0IaaGOmaiaacUdadaWcaaqaaiaaigdaaeaa % caaIZaaaaaGaay5waiaaw2faaaaa!3DB5! T = \left[ { - 2;\frac{1}{3}} \right]\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg2 % da9maajadabaGaeyOeI0IaaGOmaiaacUdadaWcaaqaaiaaigdaaeaa % caaIZaaaaaGaayjkaiaaw2faaaaa!3DB5! T = \left( { - 2;\frac{1}{3}} \right]\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg2 % da9maajadabaGaeyOeI0IaeyOhIuQaai4oamaalaaabaGaaGymaaqa % aiaaiodaaaaacaGLOaGaayzxaaaaaa!3E6A! T = \left( { - \infty ;\frac{1}{3}} \right]\)
Câu 14

Cho hàm số \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOzamaabm % aabaGaamiEaaGaayjkaiaawMcaaiabg2da9iGacYgacaGGVbGaai4z % amaaBaaaleaadaWcaaqaaiaaigdaaeaacaaIZaaaaaqabaGcdaqada % qaaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHsislcaaI1aGaamiE % aiabgUcaRiaaiEdaaiaawIcacaGLPaaaaaa!46BE! f\left( x \right) = {\log _{\frac{1}{3}}}\left( {{x^2} - 5x + 7} \right)\). Nghiệm của bất phương trình f(x) > 0 là:

A.
x > 3
B.
x < 2 hoặc x > 3
C.
2 < x < 3
D.
x < 2
Câu 15

Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaikdaaeqaaOGaamiEaiabgUcaRiGacYga % caGGVbGaai4zamaaBaaaleaacaaIZaaabeaakiaadIhacqGH+aGpca % aIXaaaaa!4217! {\log _2}x + {\log _3}x > 1\) có nghiệm là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+iaaiodadaahaaWcbeqaaiGacYgacaGGVbGaai4zamaaBaaameaa % caaIYaaabeaaliaaiAdaaaaaaa!3D66! x > {3^{{{\log }_2}6}}\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+iaaikdadaahaaWcbeqaaiGacYgacaGGVbGaai4zamaaBaaameaa % caaIZaaabeaaliaaiAdaaaaaaa!3D66! x > {2^{{{\log }_3}6}}\)
C.
x > 6
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+iaaiodadaahaaWcbeqaaiGacYgacaGGVbGaai4zamaaBaaameaa % caaI2aaabeaaliaaikdaaaaaaa!3D66! x > {3^{{{\log }_6}2}}\)
Câu 16

Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaabmaabaGaciiBaiaac+gacaGGNbWaaSbaaSqaaiaaiodaaeqaaO % WaaSaaaeaacaaIYaGaamiEaiabgUcaRiaaigdaaeaacaWG4bGaeyOe % I0IaaGymaaaaaiaawIcacaGLPaaacqGH+aGpcaaIWaaaaa!479A! {\log _{\frac{1}{2}}}\left( {{{\log }_3}\frac{{2x + 1}}{{x - 1}}} \right) > 0\) có tập nghiệm là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaeyOeI0IaaGOmaaGaayjkaiaawMcaaaaa % !3C43! \left( { - \infty ; - 2} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaeyOeI0IaaGOmaaGaayjkaiaawMcaaiab % gQIiipaabmaabaGaaGinaiaacUdacqGHRaWkcqGHEisPaiaawIcaca % GLPaaaaaa!433C! \left( { - \infty ; - 2} \right) \cup \left( {4; + \infty } \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aI0aGaai4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!3B4D! \left( {4; + \infty } \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcaaIYaGaai4oaiabgkHiTiaaigdaaiaawIcacaGLPaaacqGH % QicYdaqadaqaaiaaigdacaGG7aGaaGinaaGaayjkaiaawMcaaaaa!40EE! \left( { - 2; - 1} \right) \cup \left( {1;4} \right)\)
Câu 17

Tập nghiệm của bất phương trình: \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaiodaaaaabeaa % kmaabmaabaGaamiEaiabgkHiTiaaiodaaiaawIcacaGLPaaacqGHsi % slcaaIXaGaeyOpa4JaaGimaaaa!421C! {\log _{\frac{1}{3}}}\left( {x - 3} \right) - 1 > 0\) có dạng (a;b). Khi đó giá trị a + 3b bằng ?

A.
15
B.
13
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIZaGaaG4naaqaaiaaiodaaaaaaa!383E! \frac{{37}}{3}\)
D.
30
Câu 18

Tậpnghiệmcủabấtphươngtrình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaabmaabaGaciiBaiaac+gacaGGNbWaaSbaaSqaaiaaiAdaaeqaaO % WaaSaaaeaacaWG4bWaaWbaaSqabeaacaaIYaaaaOGaey4kaSIaamiE % aaqaaiaadIhacqGHRaWkcaaI0aaaaaGaayjkaiaawMcaaiabgYda8i % {\log _{\frac{1}{2}}}\left( {{{\log }_6}\frac{{{x^2} + x}}{{x + 4}}} \right) < 0\) là 

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaaGinaiaacUdacqGHsislcaaIZaaacaGL % OaGaayzkaaGaeyOkIG8aaKGeaeaacaaI4aGaaGPaVlaacUdacqGHRa % WkcqGHEisPaiaawUfacaGLPaaaaaa!4640! S = \left( { - 4; - 3} \right) \cup \left[ {8\,; + \infty } \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajibabaGaaGioaiaaykW7caGG7aGaey4kaSIaeyOhIukacaGL % BbGaayzkaaaaaa!3F04! S = \left[ {8\,; + \infty } \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaeyOhIuQaaGPaVlaacUdacqGHsislcaaI % 0aaacaGLOaGaayzkaaGaeyOkIG8aaeWaaeaacqGHsislcaaIZaGaaG % PaVlaacUdacaqGGaGaaGioaaGaayjkaiaawMcaaaaa!482F! S = \left( { - \infty \,; - 4} \right) \cup \left( { - 3\,;{\rm{ }}8} \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaaGinaiaacUdacqGHsislcaaIZaaacaGL % OaGaayzkaaGaeyOkIG8aaeWaaeaacaaI4aGaaGPaVlaacUdacqGHRa % WkcqGHEisPaiaawIcacaGLPaaaaaa!45F6! S = \left( { - 4; - 3} \right) \cup \left( {8\,; + \infty } \right)\)
Câu 19

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaiodaaeqaaOWaaeWaaeaaciGGSbGaai4B % aiaacEgadaWgaaWcbaWaaSaaaeaacaaIXaaabaGaaGOmaaaaaeqaaO % GaamiEaaGaayjkaiaawMcaaiabgYda8iaaigdaaaa!4289! {\log _3}\left( {{{\log }_{\frac{1}{2}}}x} \right) < 1\) là:

A.
(0;1)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % WcaaqaaiaaigdaaeaacaaI4aaaaiaacUdacaaIXaaacaGLOaGaayzk % aaaaaa!3A84! \left( {\frac{1}{8};1} \right)\)
C.
(1;8)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaada % WcaaqaaiaaigdaaeaacaaI4aaaaiaacUdacaaIXaaacaGLOaGaayzk % aaaaaa!3A84! \left( {\frac{1}{8};3} \right)\)
Câu 20

Tìm tất cả giá trị thực của tham số m để bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaiodaaeqaaOWaaeWaaeaacaWG4bWaaWba % aSqabeaacaaIYaaaaOGaey4kaSIaaGinaiaadIhacqGHRaWkcaWGTb % aacaGLOaGaayzkaaGaeyyzImRaaGymaaaa!4421! {\log _3}\left( {{x^2} + 4x + m} \right) \ge 1\) nghiệm đúng với mọi ?

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgw % MiZkaaiEdaaaa!396C! m \ge 7\)
B.
m > 7
C.
m < 4 
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaGinaiabgY % da8iaad2gacqGHKjYOcaaI3aaaaa!3B1D! 4 < m \le 7\)
Câu 21

Tìm tất cả các giá trị thực của tham số m để phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaikdaaeqaaOWaaeWaaeaacaWGTbGaamiE % aiabgkHiTiaadIhadaahaaWcbeqaaiaaikdaaaaakiaawIcacaGLPa % aacqGH9aqpcaaIYaaaaa!41CD! {\log _2}\left( {mx - {x^2}} \right) = 2\) vô nghiệm?

A.
m < 4
B.
 -4 < m < 4
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamqaaqaabe % qaaiaad2gacqGH+aGpcaaI0aaabaGaamyBaiabgYda8iabgkHiTiaa % isdaaaGaay5waaaaaa!3D4F! \left[ \begin{array}{l} m > 4\\ m < - 4 \end{array} \right.\)
D.
m > -4
Câu 22

Tìm tất cả các giá trị thực của tham số m để bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaikdaaeqaaOGaaiikaiaaiwdadaahaaWc % beqaaiaadIhaaaGccqGHsislcaaIXaGaaiykaiabgsMiJkaad2gaaa % a!4151! {\log _2}({5^x} - 1) \le m\) có nghiệm \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgw % MiZkaaigdaaaa!3972! x \ge 1\) ?

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgw % MiZkaaikdaaaa!3968! m \ge 2\)
B.
m > 2
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyBaiabgs % MiJkaaikdaaaa!3957! m \le 2\)
D.
m < 2
Câu 23

Điều kiện xác định của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaai4BaiaacE % gadaWgaaWcbaWaaSaaaeaacaaIXaaabaGaaGOmaaaaaeqaaOWaamWa % aeaaciGGSbGaai4BaiaacEgadaWgaaWcbaGaaGOmaaqabaGccaGGOa % GaaGOmaiabgkHiTiaadIhadaahaaWcbeqaaiaaikdaaaGccaGGPaaa % caGLBbGaayzxaaGaeyOpa4JaaGimaaaa!45F7! lo{g_{\frac{1}{2}}}\left[ {{{\log }_2}(2 - {x^2})} \right] > 0\) là:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgI % GiolaabUfacqGHsislcaaIXaGaai4oaiaaigdacaGGDbaaaa!3D56! x \in {\rm{[}} - 1;1]\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgI % GiopaabmaabaGaeyOeI0IaaGymaiaacUdacaaIWaaacaGLOaGaayzk % aaGaeyOkIG8aaeWaaeaacaaIWaGaai4oaiaaigdaaiaawIcacaGLPa % aaaaa!427C! x \in \left( { - 1;0} \right) \cup \left( {0;1} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgI % GiopaabmaabaGaeyOeI0IaaGymaiaacUdacaaIXaaacaGLOaGaayzk % aaGaeyOkIG8aaeWaaeaacaaIYaGaai4oaiabgUcaRiabg6HiLcGaay % jkaiaawMcaaaaa!4417! x \in \left( { - 1;1} \right) \cup \left( {2; + \infty } \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgI % GiopaabmaabaGaeyOeI0IaaGymaiaacUdacaaIXaaacaGLOaGaayzk % aaaaaa!3D20! x \in \left( { - 1;1} \right)\)
Câu 24

Điều kiện xác định của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac6 % gadaWcaaqaaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHsislcaaI % XaaabaGaamiEaaaacqGH8aapcaaIWaaaaa!3E3B! \ln \frac{{{x^2} - 1}}{x} < 0\)

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamqaaqaabe % qaaiabgkHiTiaaigdacqGH8aapcaWG4bGaeyipaWJaaGimaaqaaiaa % dIhacqGH+aGpcaaIXaaaaiaawUfaaaaa!3F1D! \left[ \begin{array}{l} - 1 < x < 0\\ x > 1 \end{array} \right.\)
B.
x > -1
C.
x > 0
D.
\(\left[ \begin{array}{l} x < - 1\\ x > 1 \end{array} \right.\)
Câu 25

Tìm số nghiệm nguyên của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaakaaabaGaaG4maaadbeaaliabgkHiTiaa % igdaaeqaaOWaaeWaaeaacaWG4bWaaWbaaSqabeaacaaIYaaaaOGaey % OeI0IaaGOmaiaadIhacqGHRaWkcaaIXaaacaGLOaGaayzkaaGaeyOp % a4JaaGimaiaac6caaaa!45B6! {\log _{\sqrt 3 - 1}}\left( {{x^2} - 2x + 1} \right) > 0.\)

A.
Vô số 
B.
0
C.
2
D.
1
Câu 26

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaai4BaiaacE % gadaWgaaWcbaGaaGOmaaqabaGccaGGOaGaamiEamaaCaaaleqabaGa % aGOmaaaakiabgkHiTiaaiodacaWG4bGaey4kaSIaaGymaiaacMcacq % GHKjYOcaaIWaaaaa!42C0! lo{g_2}({x^2} - 3x + 1) \le 0\) là ;

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajibabaGaaGimaiaacUdadaWcaaqaaiaaiodacqGHsisldaGc % aaqaaiaaiwdaaSqabaaakeaacaaIYaaaaaGaay5waiaawMcaaiabgQ % IiipaajadabaWaaSaaaeaacaaIZaGaey4kaSYaaOaaaeaacaaI1aaa % leqaaaGcbaGaaGOmaaaacaGG7aGaaG4maaGaayjkaiaaw2faaaaa!46D5! S = \left[ {0;\frac{{3 - \sqrt 5 }}{2}} \right) \cup \left( {\frac{{3 + \sqrt 5 }}{2};3} \right]\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGimaiaacUdadaWcaaqaaiaaiodacqGHsisldaGc % aaqaaiaaiwdaaSqabaaakeaacaaIYaaaaaGaayjkaiaawMcaaiabgQ % IiipaabmaabaWaaSaaaeaacaaIZaGaey4kaSYaaOaaaeaacaaI1aaa % leqaaaGcbaGaaGOmaaaacaGG7aGaaG4maaGaayjkaiaawMcaaaaa!4622! S = \left( {0;\frac{{3 - \sqrt 5 }}{2}} \right) \cup \left( {\frac{{3 + \sqrt 5 }}{2};3} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maadmaabaWaaSaaaeaacaaIZaGaeyOeI0YaaOaaaeaacaaI1aaa % leqaaaGcbaGaaGOmaaaacaGG7aWaaSaaaeaacaaIZaGaey4kaSYaaO % aaaeaacaaI1aaaleqaaaGcbaGaaGOmaaaaaiaawUfacaGLDbaaaaa!412C! S= \left[ {\frac{{3 - \sqrt 5 }}{2};\frac{{3 + \sqrt 5 }}{2}} \right]\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9iabgwGigdaa!394B! S = \emptyset \)
Câu 27

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaabmaabaGaciiBaiaac+gacaGGNbWaaSbaaSqaaiaaikdaaeqaaO % WaaeWaaeaacaaIYaGaamiEaiabgkHiTiaaigdaaiaawIcacaGLPaaa % aiaawIcacaGLPaaacqGH+aGpcaaIWaaaaa!4678! {\log _{\frac{1}{2}}}\left( {{{\log }_2}\left( {2x - 1} \right)} \right) > 0\) là:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGymaiaacUdadaWcaaqaaiaaiodaaeaacaaIYaaa % aaGaayjkaiaawMcaaaaa!3C5E! S = \left( {1;\frac{3}{2}} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGimaiaacUdadaWcaaqaaiaaiodaaeaacaaIYaaa % aaGaayjkaiaawMcaaaaa!3C5D! S = \left( {0;\frac{3}{2}} \right)\)
C.
S = ( 0; 1)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaWaaSaaaeaacaaIZaaabaGaaGOmaaaacaGG7aGaaGOm % aaGaayjkaiaawMcaaaaa!3C5F! S = \left( {\frac{3}{2};2} \right)\)
Câu 28

Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGOmaaqaaiaaiodaaaaabeaa % kmaabmaabaGaaGOmaiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHsi % slcaWG4bGaey4kaSIaaGymaaGaayjkaiaawMcaaiabgYda8iaaicda % aaa!43FC! {\log _{\frac{2}{3}}}\left( {2{x^2} - x + 1} \right) < 0\) có tập nghiệm là:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGimaiaacUdadaWcaaqaaiaaiodaaeaacaaIYaaa % aaGaayjkaiaawMcaaaaa!3C5C! S = \left( {0;\frac{3}{2}} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaaGymaiaacUdadaWcaaqaaiaaiodaaeaa % caaIYaaaaaGaayjkaiaawMcaaaaa!3D4A! S = \left( { - 1;\frac{3}{2}} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaeyOhIuQaai4oaiaaicdaaiaawIcacaGL % PaaacqGHQicYdaqadaqaamaalaaabaGaaGymaaqaaiaaikdaaaGaai % 4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!44F3! S = \left( { - \infty ;0} \right) \cup \left( {\frac{1}{2}; + \infty } \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaeyOeI0IaeyOhIuQaai4oaiaaigdaaiaawIcacaGL % PaaacqGHQicYdaqadaqaamaalaaabaGaaG4maaqaaiaaikdaaaGaai % 4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!44F6! S = \left( { - \infty ;1} \right) \cup \left( {\frac{3}{2}; + \infty } \right)\)
Câu 29

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaiodaaeqaaOWaaSaaaeaacaaI0aGaamiE % aiabgUcaRiaaiAdaaeaacaWG4baaaiabgsMiJkaaicdaaaa!408F! {\log _3}\frac{{4x + 6}}{x} \le 0\) là:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajibabaGaeyOeI0IaaGOmaiaacUdacqGHsisldaWcaaqaaiaa % iodaaeaacaaIYaaaaaGaay5waiaawMcaaaaa!3E82! S = \left[ { - 2; - \frac{3}{2}} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajibabaGaeyOeI0IaaGOmaiaacUdacaaIWaaacaGLBbGaayzk % aaaaaa!3CC6! S = \left[ { - 2;0} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajadabaGaeyOeI0IaeyOhIuQaai4oaiaaikdaaiaawIcacaGL % Dbaaaaa!3D9C! S = \left( { - \infty ;2} \right]\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9iabl2riHkaacYfadaWadaqaaiabgkHiTmaalaaabaGaaG4maaqa % aiaaikdaaaGaai4oaiaaicdaaiaawUfacaGLDbaaaaa!4002! S = R\backslash \left[ { - \frac{3}{2};0} \right]\)
Câu 30

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaabmaabaGaamiEaiabgkHiTiaaigdaaiaawIcacaGLPaaacqGHLj % YScaaIWaaaaa!412E! {\log _{\frac{1}{2}}}\left( {x - 1} \right) \ge 0\) là:

A.
(1;2)
B.
(1;2]
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKamaeaacq % GHsislcqGHEisPcaGG7aGaaGOmaaGaayjkaiaaw2faaaaa!3BBE! \left( { - \infty ;2} \right]\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaaca % aIYaGaai4oaiabgUcaRiabg6HiLcGaay5waiaawMcaaaaa!3B94! \left[ {2; + \infty } \right)\)
Câu 31

Tìm tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaabmaabaGaamiEamaaCaaaleqabaGaaGOmaaaakiabgkHiTiaaio % dacaWG4bGaey4kaSIaaGOmaaGaayjkaiaawMcaaiabgwMiZkabgkHi % Tiaaigdaaaa!45AC! {\log _{\frac{1}{2}}}\left( {{x^2} - 3x + 2} \right) \ge - 1\)

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaacq % GHsislcqGHEisPcaGG7aGaaGPaVlaaykW7caaIXaaacaGLOaGaayzk % aaaaaa!3E6A! \left( { - \infty ;\,\,1} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaaca % aIWaGaai4oaiaaykW7caaMc8UaaGymaaGaay5waiaawMcaaiabgQIi % ipaajadabaGaaGOmaiaacUdacaaMc8UaaGPaVlaaiodaaiaawIcaca % GLDbaaaaa!45F0! \left[ {0;\,\,1} \right) \cup \left( {2;\,\,3} \right]\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaaca % aIWaGaai4oaiaaykW7caaMc8UaaGOmaaGaay5waiaawMcaaiabgQIi % ipaajadabaGaaG4maiaacUdacaaMc8UaaGPaVlaaiEdaaiaawIcaca % GLDbaaaaa!45F6! \left[ {0;\,\,2} \right) \cup \left( {3;\,\,7} \right]\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaaca % aIWaGaai4oaiaaykW7caaMc8UaaGOmaaGaay5waiaawMcaaaaa!3D11! \left[ {0;\,\,2} \right)\)
Câu 32

Tìm tập nghiệm S của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kmaalaaabaGaaGOmaaqaaiaadIhacqGHsislcaaIXaaaaiabg6da+i % aaikdaaaa!3FB6! {\log _{\frac{1}{2}}}\frac{2}{{x - 1}} > 2\)

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGymaiaacUdacaaMe8UaaGymaiabgUcaRmaakaaa % baGaaGOmaaWcbeaaaOGaayjkaiaawMcaaaaa!3EE0! S = \left( {1;\;1 + \sqrt 2 } \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGymaiaacUdacaaMe8UaaGyoaaGaayjkaiaawMca % aaaa!3D25! S = \left( {1;\;9} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGymaiabgUcaRmaakaaabaGaaGOmaaWcbeaakiaa % cUdacaaMe8Uaey4kaSIaeyOhIukacaGLOaGaayzkaaaaaa!4078! S = \left( {1 + \sqrt 2 ;\; + \infty } \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmaabaGaaGyoaiaacUdacaaMe8Uaey4kaSIaeyOhIukacaGL % OaGaayzkaaaaaa!3EBD! S = \left( {9;\; + \infty } \right)\)
Câu 33

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaGymaaqaaiaaikdaaaaabeaa % kiaadIhadaahaaWcbeqaaiaaikdaaaGccqGHLjYScqGHsislcaaIXa % aaaa!3FDF! {\log _{\frac{1}{2}}}{x^2} \ge - 1\) là

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaada % GcaaqaaiaaikdaaSqabaGccaGG7aGaey4kaSIaeyOhIukacaGLBbGa % ayzkaaGaaiOlaaaa!3C6C! \left[ {\sqrt 2 ; + \infty } \right).\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKGeaeaacq % GHsisldaGcaaqaaiaaikdaaSqabaGccaGG7aGaaGimaaGaay5waiaa % wMcaaiabgQIiipaajadabaGaaGimaiaacUdadaGcaaqaaiaaikdaaS % qabaaakiaawIcacaGLDbaacaGGUaaaaa!41AB! \left[ { - \sqrt 2 ;0} \right) \cup \left( {0;\sqrt 2 } \right].\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamWaaeaacq % GHsisldaGcaaqaaiaaikdaaSqabaGccaGG7aWaaOaaaeaacaaIYaaa % leqaaaGccaGLBbGaayzxaaGaaiOlaaaa!3C06! \left[ { - \sqrt 2 ;\sqrt 2 } \right].\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaKamaeaaca % aIWaGaai4oamaakaaabaGaaGOmaaWcbeaaaOGaayjkaiaaw2faaiaa % c6caaaa!3AF2! \left( {0;\sqrt 2 } \right].\)
Câu 34

Tìm tập nghiệm  của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaicdacaGGSaGaaGynaaqabaGcdaqadeqa % aiaaikdacaWG4bGaeyOeI0IaaGymaaGaayjkaiaawMcaaiabg6da+i % abgkHiTiaaikdaaaa!42BF! {\log _{0,5}}\left( {2x - 1} \right) > - 2\)

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmqabaWaaSaaaeaacaaIXaaabaGaaGOmaaaacaGG7aGaaGPa % VpaalaaabaGaaGynaaqaaiaaikdaaaaacaGLOaGaayzkaaaaaa!3EB8! S = \left( {\frac{1}{2};\,\frac{5}{2}} \right)\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maajibabaWaaSaaaeaacaaIXaaabaGaaGOmaaaacaGG7aGaaGPa % VpaalaaabaGaaGynaaqaaiaaikdaaaaacaGLBbGaayzkaaaaaa!3F01! S = \left[ {\frac{1}{2};\,\frac{5}{2}} \right)\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmqabaGaeyOeI0IaeyOhIuQaai4oaiaaykW7daWcaaqaaiaa % iwdaaeaacaaIYaaaaaGaayjkaiaawMcaaaaa!3F8F! S = \left( { - \infty ;\,\frac{5}{2}} \right)\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4uaiabg2 % da9maabmqabaWaaSaaaeaacaaI1aaabaGaaGOmaaaacaGG7aGaaGPa % VlabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!3F84! S = \left( {\frac{5}{2};\, + \infty } \right)\)
Câu 35

Tập nghiệm của bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaG4maiabgY % da8iGacYgacaGGVbGaai4zamaaBaaaleaacaaIYaaabeaakiaadIha % cqGH8aapcaaI0aaaaa!3E35! 3 < {\log _2}x < 4\) là:

A.
(8;16)
B.
(0;16)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca % aI4aGaai4oaiabgUcaRiabg6HiLcGaayjkaiaawMcaaaaa!3B50! \left( {8; + \infty } \right)\)
D.
R
Câu 36

Giải bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaamaalaaabaGaaG4maaqaaiaaisdaaaaabeaa % kmaabmaabaaeaaaaaaaaa8qacaaIYaGaamiEaiabgkHiTiaaigdaa8 % aacaGLOaGaayzkaaWdbiabg6da+iaaikdaaaa!4171! {\log _{\frac{3}{4}}}\left( {2x - 1} \right) > 2\) ta được:

A.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaaca % aIXaaabaGaaGOmaaaacqGH8aapcaWG4bGaeyipaWZaaSaaaeaacaaI % YaGaaGynaaqaaiaaiodacaaIYaaaaaaa!3D84! \frac{1}{2} < x < \frac{{25}}{{32}}\)
B.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+maalaaabaGaaGOmaiaaiwdaaeaacaaIZaGaaGOmaaaaaaa!3AFD! x > \frac{{25}}{{32}}\)
C.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabgY % da8maalaaabaGaaGymaaqaaiaaikdaaaaaaa!397C! x < \frac{1}{2}\) hoặc \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+maalaaabaGaaGOmaiaaiwdaaeaacaaIZaGaaGOmaaaaaaa!3AFD! x > \frac{{25}}{{32}}\)
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiEaiabg6 % da+maalaaabaGaaGymaaqaaiaaikdaaaaaaa!3980! x > \frac{1}{2}\)
Câu 37

Tập nghiệm của bất phương trình \({\log _{\frac{1}{2}}}\left( {2x - 1} \right) > - 1\) là:

A.
\( \left( {1;\frac{3}{2}} \right)\)
B.
\( \left( {\frac{3}{2}; + \infty } \right)\)
C.
\(\left( {\frac{1}{2};\frac{3}{2}} \right)\)
D.
\(\left( { - \infty ;\frac{3}{2}} \right)\)
Câu 38

Bất phương trình \(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaciiBaiaac+ % gacaGGNbWaaSbaaSqaaiaaikdaaeqaaOWaaeWaaeaacaWG4bWaaWba % aSqabeaacaaIYaaaaOGaeyOeI0IaaGOmaiaadIhacqGHRaWkcaaIZa % aacaGLOaGaayzkaaGaeyOpa4JaaGymaaaa!4337! {\log _2}\left( {{x^2} - 2x + 3} \right) > 1\) có tập nghiệm là

A.
R \ {1}
B.
R
C.
{1}
D.
\(% MathType!MTEF!2!1!+- % feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeyybIymaaa!376D! \emptyset \)
Câu 39

Tìm tọa độ giao điểm M của hai đồ thị hàm số \(y = 3^x\) và \(y = \frac{1}{3}\).

 

A.
\(\begin{array}{l} M\left( { - 1; - \frac{1}{3}} \right) \end{array}\)
B.
\(M\left( { - 1;\frac{1}{3}} \right)\)
C.
\(M\left( {1;\frac{1}{3}} \right)\)
D.
\(M\left( {1; - \frac{1}{3}} \right)\)
Câu 40

Đường cong ở hình bên là đồ thị của một hàm số trong bốn hàm số được liệt kê ở bốn
phương án A, B, C, D dưới đây. Hỏi hàm số đó là hàm số nào?

A.
\(y=-x^2+2x+1\)
B.
\(y=log_{0,5}x\)
C.
\(y=\frac{1}{2^x}\)
D.
\(y=2^x\)
Câu 41

Đường cong trong hình bên dưới là đồ thị của một hàm số trong bốn hàm số được liệt kê ở
bốn phương án A, B, C, D dưới đây. Hỏi hàm số đó là hàm số nào?

A.
\(\begin{array}{l} y = {\left( {\frac{1}{2}} \right)^x} \end{array}\)
B.
\(y = {x^2}\)
C.
\(y = {\log _2}x\)
D.
\(y = {2^x}\)
Câu 42

Hàm số nào trong các hàm số dưới đây có đồ thị phù hợp với hình vẽ bên?

A.
\(\begin{array}{l} y = {\log _{0,5}}x \end{array}\)
B.
\(y = {\log _{\sqrt 7 }}x\)
C.
\(y = {e^x}\)
D.
\(y = {e^{ - x}}\)
Câu 43

Cho \( \alpha, \beta \) là các số thực. Đồ thị các hàm số \(y = x^{\alpha} , y = x^{\beta}\)trên khoảng \((0; +\infty)\) được cho trong hình vẽ bên. Khẳng định nào sau đây là đúng?

 

A.
\(0<\beta<1<\alpha\)
B.
\(\beta<0<1<\alpha\)
C.
\(0<\alpha<1<\beta\)
D.
\(\alpha<0<1<\beta\)
Câu 44

Cho hàm số \(y=x^{-\sqrt2}\) . Mệnh đề nào sau đây là sai?

 

A.
Đồ thị hàm số không cắt trục hoành  
B.
Hàm số nghịch biến  trên \((0;+\infty)\)
C.
Hàm số có tập xác định là \((0;+\infty)\)
D.
Đồ thị hàm số không có tiệm cận
Câu 45

Cho hàm số \(y = x^{e-3}\)trong các kết luận sau kết luận nào sai?

 

A.
Đồ thị hàm số nhận Ox, Oy làm hai tiệm cận.
B.
Đồ thị hàm số luôn đi qua M(1;1)
C.
Hàm số luôn đồng biến trên \((0;+\infty)\)
D.
Tập xác định của hàm số là \(D=(0;+\infty)\)
Câu 46

Cho hàm số \(y = x^ {-\sqrt{2017}}\) . Mệnh đề nào dưới đây là đúng về đường tiệm cận của đồ thị hàm số

 

A.
Có một tiệm cận ngang và một tiệm cận đứng.
B.
Không có tiệm cận ngang và có một tiệm cận đứng.
C.
Có một tiệm cận ngang và không có tiệm cận đứng.
D.
Không có tiệm cận
Câu 47

Hình vẽ bên là đồ thị các hàm số \(y = x^a , y = x^b , y = x^c\) trên miền \((0;+\infty)\) . Hỏi trong các số a, b, c  số nào nhận giá trị trong khoảng  (0; 1) ?

 

A.
Số a
B.
Số a và số c
C.
Số b
D.
Số c
Câu 48

Hàm số nào trong hàm số sau đây có đồ thị phù hợp với hình vẽ bên

 

A.
\(y=x^3\)
B.
\(y=x^4\)
C.
\(y=x^{1\over5}\)
D.
\(y=\sqrt x\)
Câu 49

Tính đạo hàm của hàm số \(y = log (ln 2x)\)

 

A.
\(\begin{array}{l} y' = \frac{2}{{x\ln 2x.\ln 10}} \end{array}\)
B.
\(y' = \frac{1}{{x\ln 2x.\ln 10}}\)
C.
\(y' = \frac{1}{{2x\ln 2x.\ln 10}}\)
D.
\(y' = \frac{1}{{x\ln 2x}}\)
Câu 50

Cho hàm số \(f (x) = ln (x⁴ +1)\) . Đạo hàm f'(1)  bằng

 

A.
\(ln2\over2\)
B.
1
C.
\(1\over2\)
D.
2