A.\(\left\{ \begin{array}{l}x =  - \dfrac{1}{3}\\y =  - \dfrac{7}{3} + t\\z = \dfrac{{10}}{3}\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x =  - \dfrac{1}{7}t\\y = 1 - \dfrac{7}{3}t\\z = \dfrac{{10}}{3}t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x = \dfrac{3}{7}t\\y = 1 - \dfrac{{25}}{7}t\\z = \dfrac{{18}}{7}t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x = \dfrac{3}{7}\\y =  - \dfrac{{25}}{7} + t\\z = \dfrac{{18}}{7}\end{array} \right.\)

A.\(494\)
B.\(484\)
C.\(474\)
D.\(464\)

A.\(\dfrac{7}{{32}}\)
B.\(\dfrac{1}{8}\)
C.\(\dfrac{3}{{32}}\)
D.\(\dfrac{5}{{16}}\)

A.\(60\pi {a^2}\)
B.\(15\pi {a^2}\)
C.\(75\pi {a^2}\)
D.\(80\pi {a^2}\)

A.\(4\)
B.\(2\)
C.\(1\)
D.\(3\)

A.\(\dfrac{\pi }{4}\)
B.\(\dfrac{\pi }{2}\)
C.\(\dfrac{{{\pi ^2}}}{4}\)
D.\(\dfrac{{{\pi ^2}}}{2}\)

A.\(6\)
B.\(5\)
C.\(8\)
D.\(7\)

A.\( - 16\)
B.\(28\)
C.\(16\)
D.\( - 28\)

A.\(4\)
B.\(2\)
C.\(1\)
D.\(3\)

A.\(\dfrac{{\sqrt {14} a}}{3}\)
B.\(\dfrac{{\sqrt {14} a}}{6}\)
C.\(\sqrt {14} a\)
D.\(\dfrac{{\sqrt {14} a}}{{12}}\)