A.\(y = \dfrac{1}{{{x^2} + 1}}\)
B.\(y = {x^3} - x\)
C.\(y = {3^x}\)
D.\(y = \ln x\)

A.\(\overrightarrow {{u_2}} \left( {1; - 2;2} \right)\)
B.\(\overrightarrow {{u_1}} \left( {1; - 2; - 1} \right)\)
C.\(\overrightarrow {{u_3}}  = \left( {2;1;2} \right)\)
D.\(\overrightarrow {{u_4}}  = \left( {4; - 2;1} \right)\)

A.\(\left[ {\dfrac{1}{2};1} \right]\)
B.\(\left( {0;1} \right)\)
C.\(\left( {\dfrac{1}{2};1} \right]\)
D.\(\left[ {0;1} \right]\)

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

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

A.\(\dfrac{\pi }{6}\)
B.\(\dfrac{\pi }{4}\)
C.\(\arctan \sqrt 2 \)
D.\(\arctan 2\)

A.\({V_{S.BCD}} = 4{a^3}\)
B.\({V_{S.BCD}} = 2{a^3}\)
C.\({V_{S.BCD}} = \dfrac{{2{a^3}}}{3}\)
D.\({V_{S.BCD}} = \dfrac{{4{a^3}}}{3}\)

A.\(3\sqrt 2 \)
B.\(10\)
C.\(\sqrt {10} \)
D.\(18\)

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

A.\({\left( {x + 1} \right)^2} + {\left( {y + 3} \right)^2} + {\left( {z + 2} \right)^2} = 9\)
B.\({\left( {x - 1} \right)^2} + {\left( {y - 3} \right)^2} + {\left( {z - 2} \right)^2} = 9\)
C.\({\left( {x + 1} \right)^2} + {\left( {y - 3} \right)^2} + {\left( {z - 2} \right)^2} = 9\)
D.\({\left( {x - 1} \right)^2} + {\left( {y + 3} \right)^2} + {\left( {z - 2} \right)^2} = 9\)