Question

solv.... the math .......​

Answer 1

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Answer 2

$\begin{gathered}\sf \underline{To \: find : }\begin{cases} \sf{derivative \: of \: \frac{1 + x}{1 - x} }\end{cases}\end{gathered}$

$\large{ \blue{ \boxed{Answer}}}$

$\sf \large \frac{d}{dx} ( \frac{1 + x}{1 - x} ) = \frac{(1 - x) \frac{d}{dx} (1 + x) - (1 + x) \frac{d}{dx} (1 - x)}{ {(1 - x)}^{2} }$

$\large \boxed{ \implies \sf \frac{d}{dx} ( \frac{1 + x}{1 - x} ) = \frac{2}{ {(1 - x)}^{2} } }$