indefinite-integration

Question: The value of $\int_{{}}^{{}}{\frac{{{e}^{x}}}{{{e}^{x}}+1}}\,dx$ is



1) ${{e}^{x}}+c$
2) $({{e}^{x}}+1)+c$
3) $\log ({{e}^{x}}+1)+c$
4) None of these
Solution: Explanation: No Explanation
Integration by substitution

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