A.\((1; + \infty ).\)
B.\(( - \infty ;1)\)
C.\({\rm{[}}1; + \infty )\)
D.\(( - \infty ; + \infty )\)

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

A.\(15\)
B.\(28\)
C.\(14\)
D.\(84\)

A.\(\left( {5;3;0} \right)\)
B.\(\left( {3;5;0} \right)\)
C.\(\left( {0;5;2} \right)\)
D.\(\left( {3;0;2} \right)\)

A.\(3\)
B.\(\sqrt 3 \)
C.\(5\)
D.\(\sqrt 5 \)

A.\(I = 20\)
B.\(I =  - 26\)
C.\(I =  - 22\)
D.\(I = 28\)

A.\(8\sqrt 6 \pi \)
B.\(24\sqrt 6 \pi \)
C.\(10\sqrt 6 \pi \)
D.\(12\sqrt 6 \pi \)

A.\(\dfrac{1}{{2021}}\)
B.\(\dfrac{1}{{2022}}\)
C.\(\dfrac{1}{{1011}}\)
D.\(\dfrac{2}{{2019}}\)

A.\( - \dfrac{1}{6}\)
B.\(\dfrac{3}{4}\)
C.\( - \dfrac{2}{3}\)
D.\(\dfrac{4}{5}\)

A.\(\dfrac{{a\sqrt {30} }}{6}.\)
B.\(\dfrac{{a\sqrt {66} }}{{22}}\)
C.\(\dfrac{{a\sqrt {30} }}{{10}}\)
D.\(\dfrac{{a\sqrt 2 }}{2}\)