Texas Instruments TI-86 - Manual (Page 109)

Chapter 6: Graph Tools
97
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 97 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 97 of 22
Using ROOT, FMIN, FMAX, or INFLC
The steps for ROOT , FMIN , FMAX , and INFLC are the same, except for the menu selection in step 1.
ᕡ Select ROOT from the GRAPH MATH menu.
A Left Bound? prompt is displayed.
ᕢ Move the cursor onto the function for which
you want to find a root.
6 /
& &
# $
ᕣ Specify the left bound for x . Either move the
trace cursor to the left bound or enter a
value directly.
Right Bound? is displayed.
a 3 b (or
! " b)
ᕤ Specify the right bound for x as in step 3.
Guess? is displayed.
ᕥ Guess an x value near the root between the
left bound and the right bound. Either move
the cursor or enter a value.
a 1 b (or
! " b)
! " (or a
2 )
ᕦ Solve for x . The result cursor is displayed at
the solution point, the cursor coordinate
values are displayed, and the
x value is
stored in Ans .
b
In the example, the function
y(x)=x^3+.3x
2 N 4x is selected.
Step 2 is not necessary here
because only one function is
selected.
When you enter a value
directly for the left bound,
right bound, or guess, an x=
prompt is displayed on the
bottom of the graph screen.