## Thomas' Calculus 13th Edition

Integrate with respect to x by taking the antiderivative of each term. Then plug in limits to evaluate: $=-3x^{-1/3}$ with limits from 1 to 27 $=-3[(27)^{-1/3}-(1)^{-1/3}]=3(\frac{1}{3}-1)=3(2/3)=2$