Find the derivative of f(x)=x−5f(x) = x^{-5}f(x)=x−5.
−5x−6-5x^{-6}−5x−6
−5x−4-5x^{-4}−5x−4
5x−65x^{-6}5x−6
−15x−6-\frac{1}{5}x^{-6}−51x−6