Hello everyone, could someone explain to me where I am wrong because I can't find the mistake.

The quotient rule I am using is as follows\(f(x)={v(x) \over u(x)} \Rightarrow f´(x)={ v´(x)*u(x) - v(x)*u´(x)\over (u(x))^2}\)

with \(f(x)={2x\over 1-x^2}\) my result is \(f´(x)={2*(1-x^2)-2x*(-2x)\over (1-x^2)^2} \Rightarrow {2-6x^2 \over (1-x^2)^2}\)

However, the CAS calculators result is \(f´(x)={2\over 1-x^2}+{4*x^2\over(1-x^2)^2}\)

Guest Oct 21, 2019