A. \(C_{12}^2.\)
B. \(A_{12}^2.\)
C. 12
D. 35
A. 2
B. 4
C. 3
D. \(\frac{{15}}{2}.\)
A. x = 7
B. x = 5
C. x = 9
D. x = 10
A. 2a3
B. a3
C. \(\frac{{{a^3}}}{3}.\)
D. \(\frac{{2{a^3}}}{3}.\)
A. R
B. \(\left( {2; + \infty } \right).\)
C. R \ {2}
D. \(\left( { - \infty ;2} \right).\)
A. \(F\left( x \right) = \frac{{{2^{x + 1}}}}{{x + 1}} + C.\)
B. \(F\left( x \right) = \frac{{{2^x}}}{{\lg 2}} + C.\)
C. \(F\left( x \right) = {2^x}\ln 2 + C.\)
D. \(F\left( x \right) = \frac{{{2^x}}}{{\ln 2}} + C.\)
A. \(84\left( {c{m^3}} \right).\)
B. \(14\left( {c{m^3}} \right).\)
C. \(96\left( {c{m^3}} \right).\)
D. \(40\left( {c{m^3}} \right).\)
A. \(15\pi .\)
B. \(30\pi .\)
C. \(\frac{{15\pi }}{2}.\)
D. \(27\pi .\)
A. \(16\pi .\)
B. \(32\pi .\)
C. \(\frac{{32\pi }}{3}.\)
D. \(\frac{{8\pi }}{3}.\)
A. \(a = - \infty ,b = 0.\)
B. \(a = - \infty ,b = 2.\)
C. \(a = + \infty ,b = 2.\)
D. \(a = + \infty ,b = 0.\)
A. a
B. 2a
C. a2
D. 3a
A. \(\frac{{27}}{2}.\)
B. \(\frac{{9}}{2}.\)
C. \(\frac{{4}}{3}.\)
D. \(\frac{{13}}{2}.\)
A. \(y = \frac{{2x + 1}}{{x - 1}}.\)
B. \(y = \frac{{1 - 2x}}{{x - 1}}.\)
C. \(y = {x^3} - 3x + 2.\)
D. \(y = \frac{{x + 1}}{{x - 1}}.\)
A. \(\left( {0; + \infty } \right).\)
B. \(\left( { - \infty ;0} \right).\)
C. \(\left( {1; + \infty } \right).\)
D. \(\left( { - \infty ;1} \right).\)
A. I = 19
B. I = -9
C. I = 1
D. I = -1
A. 3
B. 10
C. -10
D. -6
A. z = 3 + 2i.
B. z = 2 + 3i.
C. z = 3 - 2i.
D. z = 2 - 3i.
A. \(\overrightarrow a = \left( { - 2;3;1} \right).\)
B. \(\overrightarrow b = \left( {1;3;5} \right).\)
C. \(\overrightarrow c = \left( { - 2;0;1} \right).\)
D. \(\overrightarrow d = \left( {2;0;1} \right).\)
A. \(\overrightarrow u = \left( {3; - 2;5} \right).\)
B. \(\overrightarrow u = \left( {2;3;5} \right).\)
C. \(\overrightarrow u \left( {2; - 3;5} \right).\)
D. \(\overrightarrow u = \left( {5; - 2;3} \right).\)
A. 2x + y + 4z - 12 = 0.
B. 2x + y + 4z - 16 = 0.
C. x - 2y + 3z - 12 = 0.
D. x + 2y + 3z - 16 = 0.
A. \({\left( {x - 1} \right)^2} + {\left( {y + 3} \right)^2} + {\left( {z - 5} \right)^2} = 9\)
B. \({\left( {x - 1} \right)^2} + {\left( {y + 3} \right)^2} + {\left( {z - 5} \right)^2} = 6.\)
C. \({\left( {x + 1} \right)^2} + {\left( {y - 3} \right)^2} + {\left( {z + 5} \right)^2} = 9.\)
D. \({\left( {x - 1} \right)^2} + {\left( {y - 3} \right)^2} + {\left( {z - 5} \right)^2} = 9\)
A. 45o
B. 60o
C. 30o
D. 90o
A. -3
B. 15
C. 3
D. 4
A. 3
B. \(\frac{7}{3}.\)
C. -3
D. \(\frac{1}{3}.\)
A. \(\frac{a}{{a - b}}.\)
B. \(\frac{b}{{a + b}}.\)
C. \(\frac{{a + b}}{a}.\)
D. \(\frac{{a - b}}{a}.\)
A. m = 4
B. m = 7
C. m = 5
D. m = 6
A. \(\left( {e;{e^2}} \right).\)
B. \(\left[ {{e^2}; + \infty } \right).\)
C. \(\left[ {e;{e^2}} \right].\)
D. \(\left( {0;e} \right].\)
A. \(\frac{{\pi {a^3}\sqrt 3 }}{8}.\)
B. \(\frac{{\pi {a^3}\sqrt 3 }}{{24}}.\)
C. \(\frac{{\pi {a^3}\sqrt 2 }}{6}.\)
D. \(\frac{{\pi {a^3}\sqrt 3 }}{{12}}.\)
A. \(\int\limits_1^e {\frac{{u - 2}}{{{u^2}}}du.} \)
B. \(\int\limits_2^3 {\frac{{u + 2}}{u}du.} \)
C. \(\int\limits_2^3 {\frac{{u - 2}}{{{u^2}}}} du.\)
D. \(\int\limits_2^3 {\left( {u - 2} \right){u^2}} du.\)
A. S = b - a
B. S = -b - a
C. S = -b + a
D. S = b + a
A. z = 2 + 2i.
B. z = 1 + i.
C. \(z = \frac{1}{4} - \frac{1}{4}i.\)
D. z = 2 - 2i.
A. I(2;3)
B. I(3;2)
C. I(3;-2)
D. I(-3;2)
A. \(\frac{{x + 2}}{3} = \frac{{y + 3}}{{ - 1}} = \frac{{z + 1}}{4}.\)
B. \(\frac{{x - 3}}{{ - 2}} = \frac{{y + 1}}{{ - 3}} = \frac{{z - 4}}{1}.\)
C. \(\frac{{x - 2}}{3} = \frac{{y + 3}}{{ - 1}} = \frac{{z - 1}}{4}.\)
D. \(\frac{{x - 3}}{{ - 2}} = \frac{{y - 1}}{{ - 3}} = \frac{{z - 4}}{1}.\)
A. \({\left( {x - 5} \right)^2} + {\left( {y + 1} \right)^2} + {\left( {z - 3} \right)^2} = 50.\)
B. \({\left( {x - 5} \right)^2} + {\left( {y + 1} \right)^2} + {\left( {z - 3} \right)^2} = \sqrt {50} .\)
C. \({\left( {x - 5} \right)^2} + {\left( {y + 1} \right)^2} + {\left( {z - 3} \right)^2} = 25.\)
D. \({\left( {x + 5} \right)^2} + {\left( {y - 1} \right)^2} + {\left( {z + 3} \right)^2} = 50.\)
A. \(\frac{1}{{132}}.\)
B. \(\frac{7}{{99}}.\)
C. \(\frac{7}{{264}}.\)
D. \(\frac{1}{{792}}.\)
A. \(\frac{{a\sqrt {105} }}{7}.\)
B. \(\frac{{a\sqrt {115} }}{5}.\)
C. \(\frac{{a\sqrt 7 }}{{15}}.\)
D. \(\frac{{a\sqrt {105} }}{{15}}.\)
A. 1
B. 0
C. Vô số
D. 2
A. a < 0,b < 0,c < 0,d < 0.
B. a > 0,b > 0,c > 0,d < 0.
C. a < 0,b < 0,c > 0,d < 0.
D. a < 0,b > 0,c < 0,d < 0.
A. \(\frac{{56\pi {a^3}}}{{27}}.\)
B. \(\frac{{16\pi {a^3}}}{{27}}.\)
C. \(\frac{{\pi {a^3}}}{{27}}.\)
D. \(\frac{{\pi {a^3}\sqrt 3 }}{{27}}.\)
A. \( - \frac{8}{7}.\)
B. \(\frac{{\sqrt 3 }}{4} - 1.\)
C. \( - \frac{5}{8}.\)
D. \(\frac{{11}}{8}.\)
A. 1
B. 4
C. 2
D. 3
A. \(\frac{{4\sqrt 2 }}{3}.\)
B. \(2\sqrt 2 .\)
C. \(\frac{{\sqrt 5 }}{3}.\)
D. \(\frac{{4\sqrt 5 }}{3}.\)
A. \(\sqrt {10} - \sqrt 2 .\)
B. \({\left( {\sqrt {10} - \sqrt 2 } \right)^2}.\)
C. \(\sqrt {10} + \sqrt 2 .\)
D. \({\left( {\sqrt {10} - 2} \right)^2}.\)
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