Texas Instruments TI-89 Manual De Usuario
Previews
107
4. Display the
Window Editor
, and set the
Window variables as shown to the right.
Press
8 $ 0 D 10 D .1 D 0 D
? 10 D 110 D 10 D ? 10 D 120 D 10
D 0 D .001 D 20
5. Display the Graph screen.
Because you did not specify an initial
condition, only the slope field is drawn (as
specified by
condition, only the slope field is drawn (as
specified by
Fields=SLPFLD
in the
GRAPH
FORMATS
dialog box).
Press
8 %
6. Return to the
Y= Editor
and enter an initial
condition:
yi1=10
Press
8 # ¸ 10 ¸
7. Return to the Graph screen.
Initial conditions entered in the
Y= Editor
always occur at t
0
. The graph begins at
the initial condition and plots to the right.
Then it plots to the left.
Then it plots to the left.
Press
8 %
Steps and keystrokes
Display
The initial condition is
marked with a circle.
marked with a circle.