Texas TI-86 用户手册

10DIFFEQ.DOC   TI-86, Chap 10, US English   Bob Fedorisko   Revised: 02/13/01 2:28 PM   Printed: 02/13/01 3:02 PM   Page 141 of 20

10DIFFEQ.DOC   TI-86, Chap 10, US English   Bob Fedorisko   Revised: 02/13/01 2:28 PM   Printed: 02/13/01 3:02 PM   Page 141 of 20

10DIFFEQ.DOC   TI-86, Chap 10, US English   Bob Fedorisko   Revised: 02/13/01 2:28 PM   Printed: 02/13/01 3:02 PM   Page 141 of 20

�   Display the mode screen and set 

graphing mode.

- m # # #
# " " " b

�   Display the format screen and set 

graphing format.

6 / & #
# # # # " b

�   Display the equation editor and store the

transformed system of differential
equations for y''=

y to the equation editor,

substituting 

 for y and 

 for y'.

& ' 

 # a ' 

�   Display the initial conditions editor and enter

the initial conditions if you want a specific
solution. To enter a list of initial conditions,
use 

 and 

 from the 

LIST

 menu.

- g - ”
& 

 P 

 P 

 '

# & -~ P 

P 

 ` 

 '

�   Display the axes editor and enter the two

equation variables for which you want to
solve. You must omit the prime mark ( 

 ).

�   Accept or change 

 (resolution).

- h & 

 #

& 

�   Select 

 from the 

GRAPH

 

ZOOM

 menu

to set the standard window variable values
and display the graph.

�   Clear the 

GRAPH

 menu from the screen.

. / ( )

:

In 

 graphing mode, 

 is

the independent variable and

 is the dependent variable,

where 

 

‚

 1 and 



 9.

In the example, the default
window variable values are
set initially.

When 

 field format is

selected, 

, 

,

, and 

 are

the default axes settings.
Since 

 is not part of the

equation, 

 is ignored.