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I am having trouble figuring out an algebraic trick to make this work

Evaluate the integral

$$\int_1^9\frac{x-1}{\sqrt{x}}dx$$

I know I can turn the integrand into $(x-1) (1/\sqrt{x})$ but I still don't know how to do products of intregrals.

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    break the integrand into $\sqrt{x}-\frac{1}{\sqrt{x}}$ or substitute $x=u^2$.2011-11-03

2 Answers 2