You may want to look at the following TI-92 help modules for this module.
In this section we are often interested in the portion of a function z = f(x, y) that is above the xy-plane. The following screen shows how the TI-92 Max function can be used to put a "floor" under a function.
The following screen shows a 3D graph of this function with the x, y, and z-axes all running from zero to four.
The screen below shows how the TI-92 can estimate a multiple integral like the example in this module.
The next screen shows how the TI-92 can evaluate the first iterated integral. We do this integral in two steps to emphasize the ideas involved.
The next screen does the whole iterated integral in one step.
The next screen computes the second iterated integral.
