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 2206TOOLS.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.
