A.\(k = \sqrt 5  - 1\)
B.\(k = \dfrac{{\sqrt 5  - 1}}{2}\)
C.\(k = \sqrt 3  - 1\)
D.\(k = \dfrac{{\sqrt 3  - 1}}{2}\)

A.\(T = 0\)
B.\(T =  - 48\)
C.\(T = 16\)
D.\(T = 1\)

A.\(7\)
B.\(4\)
C.\(6\)
D.\(9\)

A.\(4\)
B.\( - 2\)
C.\(2\)
D.\( - 4\)

A.\(\dfrac{1}{{1287}}\)
B.\(\dfrac{1}{{6435}}\)
C.\(\dfrac{2}{{6435}}\)
D.\(\dfrac{1}{{2145}}\)

A.\(m > f\left( 0 \right) - e\)
B.\(m < f\left( {\dfrac{\pi }{2} - 1} \right)\)
C.\(m \le f\left( {\dfrac{\pi }{2} - 1} \right)\)
D.\(m \le f\left( 0 \right) - e\)

A.\(d = \dfrac{{\sqrt 6 }}{3}\)
B.\(d = \dfrac{{\sqrt 6 }}{2}\)
C.\(d = \dfrac{{2\sqrt 5 }}{5}\)
D.\(d = \dfrac{{\sqrt 2 }}{2}\)

A.\(V = \dfrac{{{a^3}}}{2}\)
B.\(V = \dfrac{{{a^3}\sqrt 3 }}{8}\)
C.\(V = \dfrac{{3{a^3}\sqrt 3 }}{8}\)
D.\(V = \dfrac{{{a^3}}}{6}\)

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

A.\(m \ge 3 - f\left( 1 \right)\)
B.\(m \ge 3 - f\left( 4 \right)\)
C.\(m \ge 4 - f\left( 1 \right)\)
D.\(m < 4 - f\left( { - 1} \right)\)