Operation Manual

Function Graphing 3-21
8203FUNC.DOC TI-82, Chapter 3, English Bob Fedorisko Revised: 02/09/01 9:06 AM Printed: 02/09/01
12:36 PM Page 21 of 24
Using CALC (Calculate) Operations
Pressing
y
ã
CALC
ä
(above
r
) accesses a menu with operations you can use
to analyze the current graph functions. You are prompted to specify the
function(s), interval, and point.
CALCULATE Menu
CALCULATE
1: value
Calculates function value for given
X
.
2: root
Finds root of function.
3: minimum
Finds minimum of function.
4: maximum
Finds maximum of function.
5: intersect
Finds intersection of functions.
6: dy/dx
Finds numeric derivative of function.
7:
‰
f(x)dx
Finds numeric integral of function.
value
value
evaluates currently selected functions for a specified value of
X
.
1. Select
value
from the
CALC
menu. The current graph is displayed, with
a prompt for you to enter
X
.
2. Enter a real value for
X
between
Xmin
and
Xmax
(which can be an
expression). Note: When there is a value entered for
X
,
‘
clears
the value; when there is no value,
‘
cancels
value
.
3. Press
Í
. The result cursor is on the first selected function in the list
at the entered
X
and the coordinate values are displayed (even if you
have selected
CoordOff
on the
WINDOW FORMAT
screen).
4. Press
†
or
}
to move the cursor between functions at the entered
X
value. When
|
or
~
are pressed, the free-moving cursor appears. It
cannot necessarily move back to the
X
value.