A.Trục hoành
B.Đường thẳng \(y =  - 1\)
C.Đường thẳng \(x = 2\)
D.Trục tung

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

A.\(\dfrac{1}{2}\)
B.\(\dfrac{1}{4}\)
C.\(\dfrac{1}{8}\)
D.\(\dfrac{1}{{16}}\)

A.\(\dfrac{{2x + 6}}{{{x^2} + 1}}\)
B.\(\dfrac{{4x + 2}}{2}\)
C.\(\dfrac{{2x - 4}}{2}\)
D.\(\dfrac{{4x - 2}}{{{x^2} + 1}}\)

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

A.\(14\)
B.\(\sqrt {14} \)
C.\(28\)
D.\(2\sqrt {14} \)

A.\(M = 40,\,\,m = 30\)
B.\(M = 20,\,\,m =  - 2\)
C.\(M = 8,\,\,m =  - 73\)
D.\(M = 10,\,\,m =  - 11\)

A.\(\left\{ { \pm 2i;\,\,\dfrac{1}{2} \pm \dfrac{{\sqrt 3 }}{2}i} \right\}\)
B.\(\left\{ {2i} \right\}\)
C.\(\left\{ { - 2i;\,\, - \dfrac{1}{2} - \dfrac{{\sqrt 3 }}{2}i} \right\}\)
D.\(\left\{ { - 2i;\,\,\dfrac{1}{2} - \dfrac{{\sqrt 3 }}{2}i} \right\}\)

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

A.\(\dfrac{{a\sqrt 2 }}{2}\)
B.\(2a\)
C.\(\dfrac{{a\sqrt {15} }}{5}\)
D.\(\dfrac{{a\sqrt 7 }}{7}\)