Question

How to find derivatives with simplified form for this equation? `(x^2-1)/(x^2+1)`

Answer 1

The answer is:

`y'=(2x(x^2+1)-2x(x^2-1))/(x^2+1)^2=(2x(x^2+1-x^2+1))/(x^2+1)^2=`

`=(4x)/(x^2+1)^2`.