Question

$2\sin\sqrt{x} + c$

• A. $\sin\sqrt{x} + c$
• B. $\frac{1}{2}\cos\sqrt{x} + c$
• C. $\int_{}^{}{\frac{x + 1}{\sqrt{1 + x^{2}}}dx} =$
• D. None of these

Answer 1

Answer: (A)

$\sin\sqrt{x} + c$

Answer 2

Put $\cot x - \tan x + c$

$\tan x - \cot x + c$ therefore

$\int_{}^{}\left( x + \frac{1}{x} \right)^{3}dx =$.