Hi guys.
Find the derivative of this function:
$\displaystyle |(x)/(1-x^2)|$
Thanks.
The function is:
$\displaystyle f(x)=\begin{Bmatrix} \dfrac{x}{1-x^2} & \mbox{ if }& x\in (-\infty,-1)\cup [0,1)\\{}\\\dfrac{x}{x^2-1} & \mbox{if}& x\in (-1,0)\cup (1,+\infty)\end{matrix}$
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