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 February 10th, 2017, 07:41 AM #1 Member   Joined: Mar 2016 From: Sweden Posts: 32 Thanks: 4 Double integral I have the following problem $∫∫_De^{(x+y)^2} dxdy$ where $D$ is $y≤3 x, x≤3 y, 0≤x+y≤2$. Is there anyone that wants to give me some hint on where to start? Thxx!!!
 February 10th, 2017, 06:27 PM #2 Global Moderator   Joined: May 2007 Posts: 6,433 Thanks: 561 Draw a picture showing the limits. It looks like it should be a triangle.

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