February 16th, 2011, 07:44 AM  #1 
Member Joined: Feb 2011 Posts: 49 Thanks: 0  How to evaluate integrals
How do you know if you should try to evaluate an integral by using integration by parts or by rationalizing substitutions? I mean usually you set u= that is part of the integral and go from there. But there are problems where it is easier to set u=  and solve for x then transform the integral in terms of u. Or do you just have to try both ways and see which evaluate the integral. Any thoughts? 
February 16th, 2011, 01:15 PM  #2  
Global Moderator Joined: May 2007 Posts: 6,607 Thanks: 616  Re: How to evaluate integrals Quote:
 

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