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

A.\(\overline z  =  - 2 + 3i\)
B.\(\overline z  = 3 - 2i\)
C.\(\overline z  = 2 + 3i\)
D.\(\overline z  = 3 + 2i\)

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

A.\(y' = \dfrac{{4\ln 3}}{{4x + 1}}\)
B.\(y' = \dfrac{4}{{\left( {4x + 1} \right)\ln 3}}\)
C.\(y' = \dfrac{1}{{\left( {4x + 1} \right)\ln 3}}\)
D.\(y' = \dfrac{{\ln 3}}{{4x + 1}}\)

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

A.\(\left( {1;0;1} \right)\)
B.\(\left( {0;1;0} \right)\)
C.\(\left( {1;1;0} \right)\)
D.\(\left( {0;1;1} \right)\)

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

A.\(4\sqrt 3 \pi {a^2}\)
B.\(2\sqrt 3 \pi {a^2}\)
C.\(2\pi {a^2}\)
D.\(\pi {a^2}\)

A.\({30^0}\)
B.\({90^0}\)
C.\({60^0}\)
D.\({45^0}\)

A.\(\dfrac{2}{9}\)
B.\(\dfrac{1}{9}\)
C.\(\dfrac{5}{{18}}\)
D.\(\dfrac{5}{6}\)