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

A.\({e^4}\)
B.\({e^4} - 1\)
C.\(4{e^4}\)
D.\(3{e^4} - 1\)

A.\(4{\log _2}a\)
B.\({\left( {{{\log }_2}a} \right)^4}\)
C.\(\dfrac{1}{4} + {\log _2}a\)
D.\(4 + {\log _2}a\)

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

A.\(\dfrac{{{a^3}\sqrt 3 }}{3}\)
B.\(\dfrac{{{a^3}\sqrt 3 }}{4}\)
C.\(\dfrac{{{a^3}\sqrt 3 }}{2}\)
D.\(6{a^3}\)

A.\(\left( { - 1;0} \right)\)
B.\(\left( { - \infty ; - 1} \right)\)
C.\(\left( { - 1;1} \right)\)
D.\(\left( {1; + \infty } \right)\)

A.\(1\)
B.\(4\)
C.\(0\)
D.\(2\)

A.\(V = \pi rh\)
B.\(V = \pi {r^2}h\)
C.\(V = \dfrac{1}{3}\pi rh\)
D.\(V = \dfrac{1}{3}\pi {r^2}h\)

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

A.\(10\)
B.\(12\)
C.\(30\)
D.\(15\)