We were told to consider the first quadrant points satisfying the inequality:Thanks Mark and Ackbach! I now got same answer answer and integrade in two way
The only thing I did not understand is how we got this limits of integration. for x we got from 0 to 4-y and for y we got from 0 to 4 I did not understand how you get that.
So for $x$, this implies:
\(\displaystyle 0\le x\le 4-y\)
And for $y$, this implies:
\(\displaystyle 0\le y\le 4\)