Yeah so do I use substitution or integration by parts???

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- Jan 20th 2010, 06:00 PMdaskywalkerIntegral of (xe^x)/(1+x)
Yeah so do I use substitution or integration by parts???

- Jan 20th 2010, 07:35 PMFreezingbeast
if you set u=x+1, you will be able to break the function 2 integrals, and the e^(u-1) can be simplified to (e^u)/e which is merely a constant.

the first integral comes to e^(x), but the second one... i think you need the Ei function for it, correct me if i'm wrong