# Double integrals problem - help appreciated

• Dec 2nd 2012, 06:34 AM
zzizi
Double integrals problem
Hi, please look at the following problem:

$\iint_{D} 5xydydx$

I was asked to evaluate the above by considering the following:

D is the region enclosed by the triangle with vertices (1,1), (2,2) and (3,0)

I would appreciate any help in tackling this problem - many thanks in advance
• Dec 2nd 2012, 10:35 AM
a tutor
Re: Double integrals problem
What have you done?

A sketch would be a good start.
• Dec 2nd 2012, 12:37 PM
zzizi
Re: Double integrals problem - help appreciated
Yes, I sketched and found out that I need to add two separate integrals.
• Dec 2nd 2012, 12:54 PM
a tutor
Re: Double integrals problem - help appreciated
Good. Do you know the equations of the lines that form the triangle?