Texas Instruments TI-89 Titanium User Manual

Differential Equation Graphing 429
15. The exact solution to the differential
equation is given below. Enter it as y1.
y1 = (100ùe^(x/10))/(e^(x/10)+9)
Note: You can use deSolve( ) to find this
exact, general solution. ,
You can use C to
scroll up to see Plot
1 and Plot 2.
16. In the Window Editor, set the Window
variables.
xmin=L10
xmax=100
xscl=10
ymin=L10.
ymax=120.
yscl=10.
xres=2.
17. Display the Graph screen (8%).
Note: The fuzzy line on the graph
indicates differences between the
RK and
Euler values.
18. In the Window Editor, set the Window
variables to zoom in so that you can
examine the differences in more detail.
xmin=39.7
xmax=40.3
xscl=.1
ymin=85.5
ymax=86
yscl=.1
xres=2
19. Return to the Graph screen.

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