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I usually know how to do double integrals, but i have no idea how to deal with this one. plz help me solve/understand this.

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- Apr 24th 2009, 03:00 PMDMDilDouble intergral
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I usually know how to do double integrals, but i have no idea how to deal with this one. plz help me solve/understand this. - Apr 24th 2009, 03:02 PMmr fantastic
- Apr 24th 2009, 03:03 PMJhevon
integrate with respect to y first and then with respect to x, plugging in the limits as you go. note, when integrating with respect to y, treat x as a constant, and vice versa.

you need integration by parts here. to start off, let $\displaystyle u = xy$ and $\displaystyle dv = e^{x + y}~dy$ (remember, x is a constant!)

hehe, even nicer :D - Apr 24th 2009, 03:05 PMJester