A.\( - \frac{1}{2}\)
B.2
C.\( - 3\)
D.\(\frac{3}{2}\)

A.\(3\)
B.\(5\)
C.\(2\)
D.\(4\).

A.282240
B.100800
C.604800
D.\(840\).

A.\(\left( { - \infty ;\frac{9}{2}} \right)\).
B.\(\left[ {4;\frac{9}{2}} \right]\) .
C.\(\left( { - \infty ;4} \right)\).
D.\(\left[ {4; + \infty } \right)\).

A.\({3^{2017}} + 1\)
B.\(\frac{1}{2}\left( {{3^{2017}} + 1} \right)\)
C.\({3^{2017}} - 1\)
D.\(\frac{1}{2}\left( {{3^{2017}} - 1} \right)\)

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

A.\(\frac{{{\pi ^2}}}{{36}} - \frac{{\pi \sqrt 3 }}{3} + \ln 2\).     
B.\(\frac{{4{\pi ^2}}}{9} - \frac{{\pi \sqrt 3 }}{3} - \ln 2\).
C.\(\frac{{4{\pi ^2}}}{9} - \frac{{\pi \sqrt 3 }}{3} + \ln 2\) .
D.\(\frac{{{\pi ^2}}}{{36}} - \frac{{\pi \sqrt 3 }}{3} - \ln 2\).

A.\(5\sqrt 3 .\)
B.\(\sqrt {41} .\)
C.\(\sqrt {61} .\)
D.\(3\sqrt 5 .\)

A.2
B.4
C.3
D.1

A.\(z = 1 + 2i.\)
B.\(z = 1 - 2i.\)
C.\(z = 2 - i.\)
D.\(z =  - 1 - 2i.\)