Post Video Questions

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Please answer each of these questions to the best of your ability. You are welcome to re-watch parts of any of the videos to help you.

Compute the derivative of each of the following functions. To enter the number $\pi$ , type pi.

$f(x)= x \ln (x)$ , $f'(x)=\answer [validator=isDerivative]{x \ln (x)}$

$f(x)= -x \cos (x)$ , $f'(x)=\answer [validator=isDerivative]{-x \cos (x)}$

$f(x)=4^x x^4$ , $f'(x)=\answer [validator=isDerivative]{4^x x^4}$

$f(x)= \dfrac {5^x}{x^5}$ , $f'(x)=\answer [validator=isDerivative]{(5^x)/(x^5)}$