TI-92 CAS Window -- Sequences -- Pack-Hunter


The following TI-92 help topics may be useful for this module.


We begin by specifying a function like the function

        1.5p/500,      if p < 500;
r(p) ={ 
        2.0 - p/1000,  if 500 <= p.

This can be done by using the TI-92 when construction.

Missing TI-92 screen

It is important to check that you have entered this function correctly. One way to check it by graphing it. The screen below shows a graph drawn using xmin = 0 and xmax = 2000 for the x-axis and ymin = 0 and ymax = 2000 for the y-axis. Be sure that the Graph MODE is set to Function.

Missing screen

The first pack-hunter model we investigate can be described by a model like

p(1) = 100
p(n) = r(p(n - 1)) * p(n - 1)
 

Don't forget to set the Graph MODE to SEQUENCE in order to either graph or produce a table of values for one or more sequences.

The screen below shows how the Y= screen should be set up to produce a table of values or a graph for the sequence described above.

The screen below shows how the WINDOW screen should be set up.

The screen below shows the graph produced by these two screens. Notice that the style has been set to thick for the graph.

The screen below shows the table of values produced by the same two screens.

Use these two features of your TI-92 to look at the sequences discussed in this module.


Copyright c 1995 by Frank Wattenberg, Department of Mathematics, Carroll College, Helena, MT 59625.