Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Definite Integration

Question:

The value of the integral $\int_{1/e}^e|ln\,x|dx$ is:

Options:

1 - 1/e

3(1 - 1/e)

$e^{-1}-1$

None of these

Correct Answer:

None of these

Explanation:

$\int\limits_{1/e}^1-ln\,x\,dx+\int\limits_{1}^eln\,x\,dx+x=|-x\,ln\,x+x|_{1/e}^1+|x\,ln\,x-x|_{1}^e=1-(\frac{1}{e}+\frac{1}{e})+(e-e)-(0-1)=2-\frac{2}{e}$