A.\(\dfrac{{128}}{{3\sqrt 2 \pi }}\)
B.\(\dfrac{{64\sqrt 3 }}{{9\pi }}\)
C.\(\dfrac{{64}}{{3\sqrt 2 \pi }}\)
D.\(\dfrac{{128\sqrt 3 }}{{9\pi }}\)

A.\( - 6\)
B.\(6\)
C.\(0\)
D.\(2\)

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

A.\(2m\)
B.\(3,7m\)
C.\(1,7m\)
D.\(2,7m\)

A.\(\dfrac{{2a\sqrt 5 }}{3}\)
B.\(\dfrac{{a\sqrt 5 }}{3}\)
C.\(\dfrac{{a\sqrt 5 }}{6}\)
D.\(\dfrac{a}{3}\)

A.\(\left( {0;\dfrac{1}{2}} \right)\)
B.\(\left( {1; + \infty } \right)\)
C.\(\left( {\dfrac{1}{2};1} \right)\)
D.\(\left( { - \infty ;0} \right)\)

A.\(\dfrac{1}{5}\)
B.\(\dfrac{1}{{10}}\)
C.\(\dfrac{2}{5}\)
D.\(\dfrac{3}{{10}}\)

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

A.\(\left( {2;4} \right)\)
B.\(\left( {3;4} \right)\)
C.\(\left[ {3;4} \right]\)
D.\(\left[ {2;4} \right]\)

A.\(y < z < x\)
B.\(x < y < z\)
C.\(z < x < y\)
D.\(z < y < x\)