A.\(\dfrac{{\sqrt 6 a}}{3}\)
B.\(\dfrac{{\sqrt 6 a}}{4}\)
C.\(\dfrac{{2\sqrt 6 a}}{3}\)
D.\(\dfrac{{\sqrt 6 a}}{2}\)

A.\(x + 2y - 3z + 9 = 0\)
B.\(x + 2y - 3z - 9 = 0\)
C.\(2x - y + 3z + 9 = 0\)
D.\(2x - y + 3z - 9 = 0\)

A.\(\dfrac{{5\sqrt {15} \pi }}{{54}}\)
B.\(\dfrac{{5\sqrt 6 \pi }}{{27}}\)
C.\(\dfrac{{5\sqrt 5 \pi }}{{216}}\)
D.\(\dfrac{{5\sqrt 6 \pi }}{{108}}\)

A.\(f\left( 1 \right) - \dfrac{8}{3}\)
B.\(f\left( 0 \right) - 2\)
C.\(f\left( 2 \right) - \dfrac{4}{3}\)
D.\(f\left( { - 1} \right) - \dfrac{4}{3}\)

A.\(\dfrac{{25}}{{11}}\)
B.\(\dfrac{{21}}{{11}}\)
C.\(\dfrac{{31}}{{11}}\)
D.\(\dfrac{3}{{11}}\)

A.\(3787\)
B.\(729\)
C.\(2188\)
D.\(2187\)

A.\(64\)
B.\(60\)
C.\(62\)
D.\(63\)

A.\(\left\{ \begin{array}{l}x = 1 + 2t\\y = 3 + 3t\\z = 4 - t\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x = 1 + 2t\\y = 3 - 3t\\z = 4 - t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x =  - 1 + 2t\\y =  - 3 - 3t\\z =  - 4 - t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x =  - 1 - 2t\\y =  - 3 + 3t\\z =  - 4 - t\end{array} \right.\)

A.\(2\)
B.\(4\)
C.\(4\sqrt {10} \)
D.\(2\sqrt {10} \)

A.\(\left( {1; + \infty } \right)\)
B.\(\left( { - \infty ;1} \right]\)
C.\(\left( { - \infty ;1} \right)\)
D.\(\left[ {1; + \infty } \right)\)