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

A.\(\int {f\left( x \right)dx}  =  - \dfrac{1}{3}\cos 3x + C\)
B.\(\int {f\left( x \right)dx}  = 3\cos 3x + C\)
C.\(\int {f\left( x \right)dx}  = \dfrac{1}{3}\cos 3x + C\)
D.\(\int {f\left( x \right)dx}  =  - 3\cos 3x + C\)

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

A.\(4\)
B.\( - i\)
C.\(3\)
D.\( - 2\)

A.\(12\)
B.\(3\)
C.\(4\)
D.\(6\)

A.\(\sqrt {37} \)
B.\(\sqrt {111} \)
C.\(\sqrt {38} \)
D.\(\sqrt {114} \)

A.\(y =  - {x^3} - 3x + 1\)
B.\(y = \dfrac{{x + 1}}{{2x - 1}}\)
C.\(y =  - {x^2} - 2x - 1\)
D.\(y =  - {x^4} - 4{x^2}\)

A.\(y =  - {x^3} + 3x + 2\)
B.\(y =  - {x^2} + 2x + 3\)
C.\(y = {x^4} - 2{x^2} + 3\)
D.\(y = {x^3} - 3x + 2\)

A.\({a^{12}}\)
B.\({a^{\frac{4}{3}}}\)
C.\({a^{\frac{1}{{12}}}}\)
D.\({a^{\frac{3}{4}}}\)

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