Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Indefinite Integration

Question:

The primitive of the function 

$f(x)=\left(1-\frac{1}{x^2}\right) a^{x+\frac{1}{x}}, x>0$, is

Options:

$\frac{a^{x+\frac{1}{x}}}{\log _e a}$

$a^{x+\frac{1}{x}} \log _e a$

$\frac{a^{x+\frac{1}{x}}}{x} \log _e a$

$\frac{x a^{x+\frac{1}{x}}}{\log _e a}$

Correct Answer:

$\frac{a^{x+\frac{1}{x}}}{\log _e a}$

Explanation:

The primitive of f(x) is

$\int\left(1-\frac{1}{x^2}\right) a^{x+\frac{1}{x}} d x=\int a^{x+\frac{1}{x}} d\left(x+\frac{1}{x}\right)=\frac{a^{x+\frac{1}{x}}}{\log _e a}+C$