Đề kiểm tra HK2 môn Toán 12 Sở GD&ĐT Bạc Liêu năm học 2019-2020

A. 20.

B. \(\sqrt {10} .\)

C. 10

D. \(2\sqrt {10} .\)

A. \(- \sqrt 7 \).

B. \(\pm i \sqrt{7}\).

C. \(\sqrt{7}.\)

D. \(\pm 7 i.\)

A. 3.

B. 2.

C. -3i.

D. -3.

A. \(\frac{x}{2}-\frac{\sin 2 x}{4}+C.\)

B. \(x+\frac{\sin 2 x}{2}+C.\)

C. \(\frac{x}{2}+\frac{\sin 2 x}{4}+C.\)

D. \(\frac{x}{2}-\frac{\cos 2 x}{4}+C.\)

A. \(6 \cot x+C.\)

B. \(6 \tan x+C.\)

C. \(-6 \cot x+C.\)

D. \(-6 \tan x+C.\)

A. \(\overline{u_{1}}=(1 ; 0 ;-4).\)

B. \(\overrightarrow{u_{2}}=(1 ;-1 ;-4).\)

C. \(\overline{u_{3}}=(2 ;-1 ; 3).\)

D. \(\overline{u_{4}}=(1 ; 0 ; 4).\)\(\overrightarrow {{u_4}} = \left( {1;0;4} \right)\)

A. 2.

B. 1.

C. 18.

D. 3.

A. \(\frac{1}{2020}.\)

B. 1.

C. 0.

D. \(\frac{1}{2021}.\)

A. \(a=-4, b=3.\)

B. \(a=3, b=4.\)

C. \(a=3, b=-4.\)

D. \(a=-4, b=-3.\)

A. \(|z|=\sqrt{29}.\)

B. \(|z|=3 \sqrt{5},\)

C. \(|z|=5.\)

D. \(|z|=\sqrt{34}.\)

A. \(\frac{4^{x}}{\ln 4}+C.\)

B. \(4^{x+1}+C.\)

C. \(\frac{4^{x+1}}{x+1}+C.\)

D. \(\frac{4^{x+1}}{x+1}+C.\)

A. \(V = \pi \int\limits_a^b {\left| {f\left( x \right)} \right|dx} \)

B. \(V = \pi \int\limits_a^b {f\left( x \right)dx} \)

C. \(V = \pi \int\limits_a^b {{f^2}\left( x \right)dx} \)

D. \(V = \int\limits_a^b {f\left( x \right)dx} \)

A. \(S = \int\limits_{ - 1}^3 {\left( { - {x^2} + 2x + 3} \right)dx} \)

B. \(S = \int\limits_{ - 1}^3 {\left( {{x^2} - 2x - 3} \right)dx} \)

C. \(S = \int\limits_{ - 1}^3 {\left( { - {x^2} + 2x - 3} \right)dx} \)

D. \(S = \int\limits_{ - 1}^3 {\left( { - {x^2} + 4x + 3} \right)dx} \)

A. 144.

B. -144.

C. 34.

D. -34.

A. -1.

B. 2.

C. -3.

D. 4.

A. \(F\left( x \right) = \tan x + C\)

B. \(F\left( x \right) = {\rm{cos}}\,x + C\)

C. \(F\left( x \right) = {\rm{cos}}\,x + C.\)

D. \(F\left( x \right) = - {\rm{cos}}\,x + C\)

A. \(3x - 4y + 7z - 10 = 0\)

B. \(3x - 4y + 7z - 10 = 0\)

C. \(2x + 5y - 6z + 10 = 0\)

D. \(- x + 2y + 3z - 10 = 0\)

A. 1

B. 3

C. 7

D. 5

A. \(\int {5f\left( x \right)dx} = 5\int {f\left( x \right)dx} \)

B. \(\int {f\left( x \right).g\left( x \right)dx} = \int {f\left( x \right)dx} .\int {g\left( x \right)dx} \)

C. \(\int {\left[ {f\left( x \right) - g\left( x \right)} \right]dx} = \int {f\left( x \right)dx} - \int {g\left( x \right)dx} \)

D. \(\int {\left[ {f\left( x \right) + g\left( x \right)} \right]dx} = \int {f\left( x \right)dx} + \int {g\left( x \right)dx} \)

A. \({\left( {x - 2} \right)^2} + {\left( {y - 4} \right)^2} + {\left( {z + 1} \right)^2} = 2\sqrt 6 \)

B. \({\left( {x + 2} \right)^2} + {\left( {y + 4} \right)^2} + {\left( {z - 1} \right)^2} = 2\sqrt 6 \)

C. \({\left( {x + 2} \right)^2} + {\left( {y + 4} \right)^2} + {\left( {z - 1} \right)^2} = 24\)

D. \({\left( {x - 2} \right)^2} + {\left( {y - 4} \right)^2} + {\left( {z + 1} \right)^2} = 24\)

A. \(3x - y - 2z - 1 = 0\)

B. \(x - 2y + 2z + 1 = 0\)

C. \(3x - y - 2z + 1 = 0\)

D. \(x - 2y + 2z - 1 = 0\)

A. \(\ln \left( {3x + 2} \right) + C\)

B. \(\frac{1}{3}\ln \left( {3x + 2} \right) + C\)

C. \(- \frac{1}{{3{{\left( {3x + 2} \right)}^2}}} + C\)

D. \(- \frac{1}{{{{\left( {3x + 2} \right)}^2}}} + C\)

A. \(\left( { - 1; - 3;1} \right)\)

B. \(\left( { - 1; - 3;-1} \right)\)

C. \(\left( { 1; - 3;1} \right)\)

D. \(\left( { - 1; 3;-1} \right)\)

A. \( - x + y + z + 1 = 0\)

B. \(- x + y - 1 = 0\)

C. \(x - y + z - 1 = 0\)

D. \( - x + y + 1 = 0\)

A. \((3;-4)\)

B. \((3;4)\)

C. \((-3;4)\)

D. \((-3;-4)\)

A. \(\left( {3;1; - 2} \right)\)

B. \(\left( {\frac{3}{2};\frac{1}{2}; - 1} \right)\)

C. \(\left( { - \frac{1}{2};\frac{3}{2}; - 2} \right)\)

D. \(\left( {\frac{1}{2}; - \frac{3}{2};2} \right)\)

A. \(11x - 7y - 2z + 21 = 0\)

B. \(11x - 7y - 2z - 21 = 0\)

C. \(5x +3y - 4z = 0\)

D. \(x +7y - 2z+13 = 0\)

A. \(-2i.\)

B. \(2i.\)

C. 2.

D. \(-2.\)

A. \(\sqrt 2 \)

B. \(\frac{{\sqrt {10} }}{2}\)

C. 3.

D. \(\sqrt{5}\)

A. 4.

B. \(\frac{8}{3}\)

C. \(\frac{4}{3}\)

D. \(\frac{7}{3}\)

A. \(\left( {1;0;0} \right)\)

B. \(\left( {0;-2;3} \right)\)

C. \(\left( {1;0;3} \right)\)

D. \(\left( {1; - 2;0} \right)\)

A. 2

B. -2

C. 4

D. -3

A. \(6+8i\)

B. \(-6-8i\)

C. \(8-6i\)

D. \(-6+8i\)

A. \(\Delta \) cắt \(\Delta '\)

B. \(\Delta \) và \(\Delta '\)chéo nhau.

C. \(\Delta // \Delta '\)

D. \(\Delta \equiv \Delta '\)

A. -4

B. 4

C. 4i

D. 7

A. 2

B. \( - \frac{5}{6}\)

C. \(\frac{5}{6}\)

D. \( - \frac{1}{6}\)

A. \(\left( {2;3; - 1} \right)\)

B. \(\left( { - 1; - 4;3} \right)\)

C. \(\left( { - 1;1; - 2} \right)\)

D. \(\left( {2; - 2;4} \right)\)

A. \(\frac{\pi }{4}\)

B. \(\frac{\pi }{2}\)

C. \(\frac{{{\pi ^2}}}{4}\)

D. \(\frac{{{\pi ^2}}}{2}\)

A. \(\overrightarrow {{n_3}} = \left( {3;2; - 1} \right)\)

B. \(\overrightarrow {{n_4}} = \left( {3; - 2; - 1} \right)\)

C. \(\overrightarrow {{n_2}} = \left( { - 2;3;1} \right)\)

D. \(\overrightarrow {{n_1}} = \left( {3;2;1} \right)\)

A. \(\frac{{x - 1}}{3} = \frac{{y - 2}}{{ - 1}} = \frac{{z + 2}}{2}\)

B. \(\frac{{x - 3}}{1} = \frac{{y + 1}}{2} = \frac{{z - 2}}{{ - 2}}\)

C. \(\frac{{x + 1}}{3} = \frac{{y + 2}}{{ - 1}} = \frac{{z - 2}}{2}\)

D. \(\frac{{x + 3}}{1} = \frac{{y - 1}}{2} = \frac{{z + 2}}{{ - 2}}\)

A. \(\int\limits_a^b {f\left( x \right)dx} = F\left( b \right) - F\left( a \right)\)

B. \(\int\limits_a^b {f\left( x \right)dx} = F\left( b \right).F\left( a \right)\)

C. \(\int\limits_a^b {f\left( x \right)dx} = F\left( b \right) + F\left( a \right)\)

D. \(\int\limits_a^b {f\left( x \right)dx} = F\left( a \right) - F\left( b \right)\)

A. \(I\left( {0;\sqrt 8 } \right),R = 3\)

B. \(I\left( {0;\sqrt 8 } \right),R = 6\)

C. \(I\left( { - 1;\sqrt 8 } \right),R = 2\)

D. \(I\left( {0; - \sqrt 8 } \right),R = 6\)

A. \(\frac{2}{{\ln 2}}\)

B. \( - \frac{4}{{\ln 2}}\)

C. \( - \frac{2}{{\ln 2}}\)

D. \(\frac{4}{{\ln 2}}\)