• anonymous
$\int\limits_{0}^{4}\sqrt{3x+4}=\int\limits_{4}^{12}u^{1/2}(1/3)du$ when substituting u=sqrt{3x+4} which is all good but what i don't get is (1/3)*[(2/3)u^(3/2)]|from 4 to 16 where does the 2/3 and u^(3/2) come from?
Mathematics

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