1. 2. 3 I'm from Vietnam,I can't do it, help me !
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Originally Posted by butbi9x 1. 2. 3 I'm from Vietnam,I can't do it, help me ! Hi 1. You can integrate by parts 2. Twice by parts 3. By parts with and v(r)=rē
One way to do the third one is to sub And just to add on running-gag's advice for number 2, you can treat the integral as the unknown and solve for it.
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