Texas Instruments TI-89 Titanium User Manual

Symbolic Manipulation 235
For example:
Substituting Values and Setting Constraints
The “with” operator ( | ) lets you temporarily substitute values into an expression or
specify domain constraints.
Note: The example to the right finds the derivative
of x
3
at x=5. If x
3
was initially simplified to 75, you
would find the derivative of 75, which is not what
you want.
x cannot be simplified.
x is not simplified. The function uses x
3
,
and then substitutes 5 for x.
x is simplified to t. The function uses t
3
.
x is simplified to t. The function uses t
3
,
and then substitutes 5 for t.

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