GATE Chemical 2013 | Question: 4

Question

Evaluate 

 ${\displaystyle \int \frac{dx}{e^x – 1}}$

(Note: C is a constant of integration)

• A. $\frac{e^x}{e^x -1}$ + C
• B. $\frac {In(e^x -1)}{e^x}$ + C
• C. In$(\frac {e^x}{e^x -1})$ + C
• D. In(1 – e$^{-x}$) + C