i know this is integration by parts so here is the problem I am currently confused on how the get an answer(adsbygoogle = window.adsbygoogle || []).push({});

r e^r/2 dr

I know I the formula is int udv= uv - int du v

what i am not getting is what to use for this one. I figured

e^r/2 = v and du = r

so u= r^2/2 and what will that make dv? i have always had trouble with this part.

so while i try another guys plz help... make me not go insane...

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# Integration by parts r e^r/2 dr

**Physics Forums | Science Articles, Homework Help, Discussion**