differentiation

Question: The function $f(x)=\log (1+x)-\frac{2x}{2+x}$is increasing on



1) (0, $\infty $)
2) ($-\infty $, 0)
3) $(-\infty ,\infty )$
4) None of these
Solution: Explanation: No Explanation
Increasing and Decreasing function

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