Texas Instruments TI-89 Titanium User Manual

Differential Equation Graphing 432
Before using deSolve( ), clear any existing t and y variables. Otherwise, an error occurs.
1. In the Home screen
@ " "use
deSolve( ) to
find the general solution.
2. Use the solution to define a function.
a) Press C to highlight the solution in
the history area. Then press ¸ to
autopaste it into the entry line.
b) Insert the
Define instruction at the
beginning of the line. Then press
¸.
Note: Press 2A to move to the
beginning of the entry line.
3. For an initial condition
y=10 with t=0, use
solve( ) to find the @1 constant.
Note: If you got a different constant (@2,
etc.), solve for that constant.
@1 represents a
constant. You may
get a different
constant (@2, etc.).
For @, type
@89
H2
R

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