Find f′(x)f'(x)f′(x) for f(x)=x3f(x) = \sqrt[3]{x}f(x)=3x.
13x−2/3\frac{1}{3}x^{-2/3}31x−2/3
13x1/3\frac{1}{3}x^{1/3}31x1/3
3x2/33x^{2/3}3x2/3
23x−1/3\frac{2}{3}x^{-1/3}32x−1/3