Solving Substitution Problem: \int (x2 +2x +1)e^(-ln(x+1)) dx

[maff is tuff]

Homework Statement

\int (x² +2x +1)e^(-ln(x+1)) dx

Homework Equations

The Attempt at a Solution

I started off by factoring the integrand into:

\int (x+1)(x+1)e^(-ln(x+1)) du

Then I tried to make a substitution:

u=(x+1) so du=dx

This left me with this:

\int u² e^(-lnu) du

So now do I use integration by parts or something? Thanks in advance for the help. And also, if someone responds to my question and I want to respond back, do I just reply to this same thread or PM the person who responded? I ask this because I don't know if I were to reply to this thread if the person will be notified or not. Thanks again.

 

[Abe21599]

http://www.wolframalpha.com/input/?i=integrate++(x2++2x++1)e^(-ln(x+1))+dx

and clicking on show steps will help out too