Texas Instruments Titanium TI-89 User Manual

Symbolic Manipulation 252
• 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 Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)