Texas TI-86 用户手册

20ATOZ.DOC   TI-86, Chap 20, US English   Bob Fedorisko   Revised: 02/13/01 2:42 PM   Printed: 02/13/01 3:05 PM   Page 287 of 118

20ATOZ.DOC   TI-86, Chap 20, US English   Bob Fedorisko   Revised: 02/13/01 2:42 PM   Printed: 02/13/01 3:05 PM   Page 287 of 118

† GRAPH menu

To enter the ' character for
the Q' variables, use the
CHAR MISC

 menu.

In 

 graphing mode, draws the solution to a set of

differential equations stored in the 

 variables

specified by xAxisVariable and yAxisVariable. If
direction fields are off (

 is selected), the initial

values must be stored also.

After the solution is drawn, 

 waits for you to

move the cursor to a new initial value and press b
to draw the new solution.

You then are prompted to press 

 (to specify another

initial value) or 

 (to stop).

For the last-drawn solution, the 

, 

, and 

 values

(beginning at their initial values) are stored to xList,
yList

, and tList, respectively.

Does not store 

, 

, and 

 values for the solution.

In 

 graphing mode, starting with a 

graph screen:

L

Move the cursor to a new initial value.
b

Press 

 to stop graphing. You can then

examine 

, 

, and 

.

GRAPH DRAW menu

Draws the inverse of expression by plotting 

 values on

the y-axis and 

 values on the x-axis.

In 

 graphing mode: