Texas Instruments TI-89 Titanium User Manual

Symbolic Manipulation 239
• Infinite recursions can occur when you define a substitution variable in terms of
itself.
When you enter a substitution that causes an infinite recursion:
• Internally, an expression is sorted according to the automatic simplification rules.
Therefore, products and sums may not match the order in which you entered them.
- An error message is displayed.
- When you press N, an error is
shown in the history area.
- As a general rule, you should
substitute for a single variable.
sin(x)|x=x+1
Substitutes sin(x+1), sin(x+1+1),
sin(x+1+1+1), etc

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches