Mathematics

If $$\displaystyle \int { \frac { { e }^{ x }-1 }{ { e }^{ x }+1 } dx } =f\left( x \right) +C$$, then $$f\left( x \right)$$ is equal to 


ANSWER

$$2\log { \left( { e }^{ x }+1 \right) } $$


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Single Correct Medium Published on 17th 09, 2020
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