A.\(\dfrac{{4\sqrt 2 }}{3}a\)
B.\(\sqrt {14} a\)
C.\(\dfrac{{4\sqrt {14} }}{7}a\)
D.\(\dfrac{{8\sqrt {14} }}{7}a\)

A.\(\left( { - \infty ;1} \right]\)
B.\(\left( { - \infty ;4} \right]\)
C.\(\left( { - \infty ;1} \right)\)
D.\(\left( { - \infty ;4} \right)\)

A.810.000.000
B.813.529.000
C.797.258.000
D.830.131.000

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

A.\( - 2\)
B.\( - 3\)
C.\( - 5\)
D.\( - 4\)

A.\(\dfrac{{9{a^3}}}{{16}}\)
B.\(\dfrac{{2{a^3}}}{3}\)
C.\(\dfrac{{9{a^3}}}{{32}}\)
D.\(\dfrac{{{a^3}}}{3}\)

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

A.\(\dfrac{{a\sqrt 2 }}{2}\)
B.\(\dfrac{{a\sqrt {39} }}{{13}}\)
C.\(\dfrac{a}{2}\)
D.\(\dfrac{{a\sqrt {21} }}{7}\)

A.\(\dfrac{{50}}{{81}}\)
B.\(\dfrac{5}{9}\)
C.\(\dfrac{5}{{18}}\)
D.\(\dfrac{1}{2}\)

A.\(25cm \div \infty \)
B.\(24cm \div \infty \)
C.\(22cm \div 120cm\)
D.\(25cm \div 120cm\)