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.

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

$f(x) = \dfrac {\ln (x)}{5x^3}$ , $f'(x)=\answer [validator=isDerivative]{(\ln (x))/(5 x^3)}$

$f(x) = \dfrac {7^x}{x^3}$ , $f'(x)=\answer [validator=isDerivative]{(7^x)/(x^3)}$