A.\({2021^2}\)
B.\({2^{2021}}\)
C.\(2021!\)
D.\(4042\)

A.\(\int\limits_a^b {\left| {f\left( x \right)} \right|dx} \)
B.\(\int\limits_a^b {f\left( x \right)dx} \)
C.\(\int\limits_a^b {{f^2}\left( x \right)dx} \)
D.\(\pi \int\limits_a^b {f\left( x \right)dx} \)

A.\( - 2\)
B.\(2\)
C.\( - 1\)
D.\(1\)

A.\(\left( { - \infty ; + \infty } \right)\)
B.\(\left[ { - 5;1} \right)\)
C.\(\left( { - 5;1} \right)\)
D.\(\left[ { - 5;1} \right]\)

A.\({\left( {x + 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z + 3} \right)^2} = 16\)
B.\({\left( {x - 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z - 3} \right)^2} = 16\)
C.\({\left( {x + 1} \right)^2} + {\left( {y + 2} \right)^2} + {\left( {z + 3} \right)^2} = 4\)
D.\({\left( {x - 1} \right)^2} + {\left( {y - 2} \right)^2} + {\left( {z - 3} \right)^2} = 4\)

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

A.\(2019\)
B.\(2022\)
C.\(2020\)
D.\(2021\)

A.\(AB\)
B.\(AO\)
C.\(AD\)
D.\(SO\)

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

A.\(\pi \int\limits_0^1 {{e^{3x}}dx} \)
B.\(\int\limits_0^1 {{e^{3x}}dx} \)
C.\(\int\limits_0^1 {{e^{6x}}dx} \)
D.\(\pi \int\limits_0^1 {{e^{6x}}dx} \)