AP EAMCET2007MathematicsIndefinite Integration
If e^x-1 e^x+1 d x=f(x)+c , then f(x) is equal to
Options
- A2 (e^x+1 )
- B(e^ 2 x -1 )
- C2 (e^x+1 )-x
- D(e^ 2 x +1 )
Correct answer
C. 2 (e^x+1 )-x
Step-by-step solution
We have, e^x-1 e^x+1 d x= ( 2 e^x e^x+1 -1 ) d x=2 (e^x+1 )-x+c On comparing with f(x)+c , we get f(x)=2 (e^x+1 )-x