A.\(\dfrac{{125\pi }}{6}\)
B.\(\dfrac{{500\pi }}{3}\)
C.\(100\pi \)
D.\(25\pi \)

A.\(5\)
B.\(2\)
C.\(3\)
D.\(1\)

A.\(5\)
B.\(4\)
C.\(6\)
D.\(3\)

A.\(R = \sqrt 3 \)
B.\(R = \dfrac{{\sqrt 3 }}{3}\)
C.\(R = 3\)
D.\(R = \dfrac{1}{3}\)

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

A.\(60480\)
B.\(151200\)
C.\(136080\)
D.\(15120\)

A.\(C_n^k = \dfrac{{n!}}{{\left( {n - k} \right)!\left( {k + 1} \right)!}}\)
B.\(C_n^k = \dfrac{{n!}}{{\left( {n - k} \right)!}}\)
C.\(A_n^k = \dfrac{{n!}}{{\left( {n - k} \right)!k!}}\)
D.\(A_n^k = \dfrac{{n!}}{{\left( {n - k} \right)!}}\)

A.\(20;\,\,30;\,\,12\)
B.\(12;\,\,30;\,\,20\)
C.\(30;\,\,12;\,\,20\)
D.\(12;\,\,20;\,\,30\)

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

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