TI -86 用户手册

06TOOLS.DOC   TI-86, Chap 6, US English   Bob Fedorisko   Revised: 02/13/01 2:23 PM   Printed: 02/13/01 3:01 PM   Page 99 of 22

06TOOLS.DOC   TI-86, Chap 6, US English   Bob Fedorisko   Revised: 02/13/01 2:23 PM   Printed: 02/13/01 3:01 PM   Page 99 of 22

The steps for using 

 and 

 are the same, except for the menu selection in step 1.

�   Select 

 from the 

GRAPH

 

MATH

 menu.

The current graph is displayed.

�   Move the cursor to the function with the point for

which you want to find the derivative, or slope.

6 /
& '
# $

�   Move the cursor to the point (or enter the 

value).

�   Solve.

♦ 

For 

, the solution 

 is displayed

and stored in 

.

♦ 

For 

, a tangent line also is displayed.

! "
b

To remove the tangent line and 

 prompt, select 

 from the 

GRAPH

 

DRAW

 menu.

In the example, the function

2

 is selected.

 (

GRAPH

 

MATH

 menu)

and 

 (

GRAPH

 

DRAW

menu) both draw a tangent
line on the graph; only

 displays the solution,

.