April 13th, 2010, 12:10 PM  #1 
Newbie Joined: Jan 2010 Posts: 13 Thanks: 0  improper integral
[1,inf] (x^2+2x+5)/(x^3+x+1) dx [0,1] (e^x)/sqrt(x) dx I know both of them have to do with the pintegral but I am not sure how to can break them down algebraically so they can be solve just the form like (1/x)^p 
April 13th, 2010, 03:37 PM  #2  
Global Moderator Joined: May 2007 Posts: 6,342 Thanks: 534  Re: improper integral Quote:
For the second integral, let u=sqrt(x) and see what you get.  

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