<exercise checkit-seed="0002" checkit-slug="Demo2" checkit-title="Product Rule">
<statement>
<p>
Explain how to find the rate of change <m>f'(x)</m>.
</p>
<me>
f(x)=-4 \, \cos\left(x\right) \log\left(x\right)
</me>
</statement>
<answer>
<me>
f'(x)=4 \, \log\left(x\right) \sin\left(x\right) - \frac{4 \, \cos\left(x\right)}{x}
</me>
</answer>
</exercise>