A.\(S = \dfrac{1}{2}\pi {a^2}\)
B.\(S = 4\pi {a^2}\)
C.\(S = \pi {a^2}\)   
D.\(S = 2\pi {a^2}\)

A.\(V = 3{a^3}\)
B.\(V = 6{a^3}\)
C.\(V = {a^3}\)
D.\(V = 2{a^3}\)

A.\(\tan \angle ACB = \dfrac{5}{3}\)
B.\(\tan \angle ACB = \dfrac{3}{5}\)
C.\(\tan \angle ACB = \dfrac{4}{5}\)
D.\(\tan \angle ACB = \dfrac{3}{4}\)

A.\(7\)
B.\(73\)
C.\(-7\)
D.\(-3\)

A.\(x > 3\)
B.\(x \ge 0\)
C.\(x \ge 0\) và \(x \ne 3\)  
D.\(x \ne 3\)

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

A.\(m =  - 1\)
B.\(m = 1\)
C.\(m = 0\)
D.\(m = \dfrac{1}{2}\)

A.
B.
C.
D.

A.\({P_{\min }} = 19\,\,;\,\,\,{P_{\max }} = 259\)
B.\({P_{\min }} = 17\,\,;\,\,\,{P_{\max }} = 259\)
C.\({P_{\min }} = 19\,\,;\,\,\,{P_{\max }} = 319\)
D.\({P_{\min }} = 17\,\,;\,\,\,{P_{\max }} = 319\)

A.\(144{m^2}\)
B.\(288\,{m^2}\)
C.\(540\,{m^2}\)
D.\(432\,{m^2}\)