Question

$f(x) =$ equals.

• A. $\log x + \frac{x^{2}}{2} + 2$
• B. $\log x + \frac{x^{2}}{2} + 1$
• C. $\log x - \frac{x^{2}}{2} + 2$
• D. $\log x - \frac{x^{2}}{2} + 1$

Answer 1

Answer: (A)

$\log x + \frac{x^{2}}{2} + 2$

Answer 2

$(3x^{2} + 5) = t$

$\int_{}^{}{\frac{\sec^{2}x}{(1 + \tan x)(2 + \tan x)}\mspace{6mu} dx}$.