I don't know which of the factores to pick out as the "u"

1. integral of e ^x/2

2. integral of ln4xdx/x

thanks!

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- Jan 13th 2010, 06:01 AMlittlesohiIntegration by Substitution!
I don't know which of the factores to pick out as the "u"

1. integral of e ^x/2

2. integral of ln4xdx/x

thanks! - Jan 13th 2010, 06:07 AMdedust