Solution 15465: Valid Sequence Functions for Web Plots on the TI-89 Titanium or Voyage™ 200.
Can I graph every sequence on a WEB axes on the TI-89 Titanium or Voyage 200?
A sequence must meet the following criteria to be graphed properly on the WEB axes. The sequence:
• Must be recursive with only one recursion level. For example u(n-1) but not u(n-2).
• Cannot reference n directly.
• Cannot reference any other defined sequence on the calculator except itself.
After the sequence is plotted, the web may be displayed manually or automatically, depending on how the Build Web mode is set on the AXES dialog box. If the mode is set to TRACE, the sequence will not draw until [F3] is pressed. If the mode is set to AUTO, the sequence will draw automatically.
Please see the TI-89 Titanium and Voyage 200 guidebooks for additional information.