Answer
$\dfrac{d}{dx}(cx^n)=c\dfrac{d}{dx}(x^n)=cnx^{n-1}$
Work Step by Step
To derivate a function multiplied by a constant, you can multiply that constant by the derivate of the function:
$\dfrac{d}{dx}(cx^n)=c\dfrac{d}{dx}(x^n)$
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