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-   -   Double Integral in Rectangular Coordinates (http://www.physicsforums.com/showthread.php?t=348671)

memish Oct24-09 10:21 PM

Double Integral in Rectangular Coordinates
 
1. The problem statement, all variables and given/known data

http://i34.tinypic.com/mcqm2r.jpg

2. Relevant equations

n/a

3. The attempt at a solution
I set up the intgral at
integral from 0 to 5 of integral from 0 to 5y of 8e^(y^2)dxdy

I solved it as an iterated integral so I solved the first part, then ended up with integral from 0 to 5 of 40ye^(y^2)

Am I going about it right? Isn't there no antideriative for e^(y^2)? I dont know where to go from here in solving this

Thanks everyone.

Dick Oct24-09 10:35 PM

Re: Double Integral in Rectangular Coordinates
 
Yes, there's no elementary antiderivative for e^(y^2). There is one for y*e^(y^2). Use the substitution u=y^2.


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