Texas Instruments TI-86 - Manual (Page 112)

100
Chapter 6: Graph Tools
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 100 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 100 of 22
Using ISECT
ᕡ Select ISECT from the GRAPH MATH menu.
The current graph is displayed with First Curve?
at the bottom of the graph screen.
ᕢ Select the first function (curve). The cursor
moves to the next function and Second Curve?
is displayed.
6 /
& / (
# $ b
ᕣ Select the second function (curve).
Guess? is
displayed.
ᕤ Guess the intersection. Either move the cursor to
a point near an intersection or enter an x value.
# $ b
a 1 ` 5
(or ! ")
ᕥ Solve. The result cursor is displayed at the
intersection , the cursor coordinates are the
result, and the
x value is stored to Ans .
b
Using YICPT
To use YICPT , select YICPT from the GRAPH MATH menu (6 / & / '). Press
# and $ to select a function, and then press b. The result cursor is displayed at the
y-intercept, the cursor coordinate values are displayed, and
y is stored in Ans .
In the example, the functions
y(x)=x^3+.3x
2 N 4x and
y(x)=x 2 +3x N 3 are selected.