# Math Help - Double integral

1. ## Double integral

I don't understand how to solve this problem.

double integral of xy dA where R is the region bounded by y=x , y=2x and x+y=2

2. Originally Posted by s7b

I don't understand how to solve this problem.

double integral of xy dA where R is the region bounded by y=x , y=2x and x+y=2
1)Draw the region.
2)Find the point of intersection between y=x and y=2x
3)Drop a vertical line from this point so that it divides R into two pieces.
4)Now find the area of each piece.

3. Originally Posted by s7b