Hi! I'm stuck with the following problem:(adsbygoogle = window.adsbygoogle || []).push({});

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Calculate

∫∫(x-y)*|ln(x+2y)| dxdy

where D is the triangle with corners in the coordinates (0,0), (1,1) and (-3,3)

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I get the following lines that forms the triangle:y=-x, y=xandy=-1/2*x+3/2

Im thinking that I start with substitution:(x-y)=uandx+2y=v

Which gives me∫∫ u*|ln(v)| dudv

After that I don't know how to continue. I would like to know which new "intervals" I should do the integral between when I am in my new u- and v-domain?

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# [Double integral] Area of a triangle

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