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The product rule for $\dfrac{d}{dx}(uv)$ is:

A$u v' - u' v$

B$u' v + u v'$

C$u' + v'$

D$u' v'$

Answer & Solution

Correct answer: B. $u' v + u v'$

**Product rule:** $(uv)' = u'v + uv'$. Add the two terms (don't multiply!).

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