## Calculus (3rd Edition)

(a) since $f(x)=x^2$ is of the form $x^n$, then the Power Rule does apply to find $f'(x)$ (b) since $f(x)= 2^2$ is not of the form $x^n$, then the Power Rule does not apply. (c) since $f(x)=x^e$ is of the form $x^n$, then the Power Rule does apply to find $f'(x)$ (d) since $f(x)= e^x$ is not of the form $x^n$, then the Power Rule does not apply. (e) since $f(x)= x^x$ is not of the form $x^n$, then the Power Rule does not apply. (f) since $f(x)=x^{-4/5}$ is of the form $x^n$, then the Power Rule does apply to find $f'(x)$