A.\(\cos x - \dfrac{2}{{{x^2}}} + C\)
B.\( - \cos x + 2\ln \left| x \right| + C\)
C.\( - \cos x - 2\ln \left| x \right| + C\)
D.\(\cos x + 2\ln \left| x \right| + C\)

A.\(\dfrac{1}{2}\)
B.\(\sqrt 3 \)
C.\(2\)
D.\(\dfrac{{\sqrt 3 }}{3}\)

A.\(\overrightarrow {{n_2}}  = \left( { - 2; - 3;6} \right)\)
B.\(\overrightarrow {{n_3}}  = \left( { - 2;3; - 6} \right)\)
C.\(\overrightarrow {{n_4}}  = \left( { - 2;3;6} \right)\)
D.\(\overrightarrow {{n_1}}  = \left( {3; - 2; - 1} \right)\)

A.\(I = 0\)
B.\(I = 2\)
C.\(I = 1\)
D.\(I = 3\)

A.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{1}{{24}}\)
B.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{1}{4}\)
C.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{4}{{15}}\)
D.\(\dfrac{{{V_1}}}{{{V_2}}} = \dfrac{8}{{15}}\)

A.\(y = x + 7\)
B.\(y = x + 1\)
C.\(y = x - 7\)
D.\(y = x - 1\)

A.\(\sqrt {26} \)
B.\(5\sqrt 2 \)
C.\(\sqrt {65} \)
D.\(\sqrt {41} \)

A.\(56\)
B.\(8{\log _2}256\)
C.\(36\)
D.\(48\)

A.\(y = \dfrac{{ - x + 2}}{{2x - 1}}\)
B.\(y = \dfrac{{x - 2}}{{2x - 1}}\)
C.\(y = \dfrac{{ - x - 2}}{{2x - 1}}\)
D.\(y = \dfrac{{x + 2}}{{2x - 1}}\)

A.\(V = \dfrac{{{a^3}\sqrt 3 }}{2}\)
B.\(V = \dfrac{{{a^3}\sqrt 3 }}{3}\)
C.\(V = \dfrac{{{a^3}}}{6}\)
D.\(V = \dfrac{{{a^3}\sqrt 3 }}{6}\)