The key is figuring out the limits of integration. Note that the region of space over which you are integrating is the region bound by the plane , the plane , and the parabolic cylinder .
I forget how to reverse the order of integration for triple integrals, here's the question.
Express the iterated integral
as an equivalent integral in which the y-integration is performed 1st, the z-integration second, and the x-integration last.
Thanks for any help.