00:01
All right, we're going to integrate with respect to z first.
00:05
So let me write it in this way.
00:07
The x and the y squared are just constant.
00:10
So it's 1 over z, dz.
00:15
So the integral of 1 over z, dz is the natural log.
00:21
So now you have x, y, squared, natural log of z from 1 to e, dx, d, y.
00:31
So negative 3 to 4, 4 to 5, x, x, y squared, now.
00:38
Of e minus the natural log of 1, dx, d, y.
00:44
The natural log of 1 is 0.
00:47
The natural log of e is 1.
00:49
So now you just have minus 3 to 4, 4 to 5, xy squared, d x, d x, d y.
00:59
So now the y squared is a constant, so you just integrate an x...