let

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- July 20th 2011, 05:13 AMPunchintegration by substitution
let

- July 20th 2011, 05:37 AMProve ItRe: integration by substitution
It's a good idea to get a common denominator...

Now make the substitution and the integral becomes

- July 20th 2011, 06:43 AMQuackyRe: integration by substitution