Texas Instruments -84 Plus, Manual Book

Page: 133 / 696

Chapter 3: Function Graphing 130
2. Press
†
or
}
, if necessary, to move the cursor to the first function, and then press
Í
.
Second curve?
is displayed in the bottom-left corner.
3. Press
†
or
}
, if necessary, to move the cursor to the second function, and then
press
Í
.
4. Press
~
or
|
to move the cursor to the point that is your guess as to location of the
intersection, and then press
Í
.
The cursor is on the solution and the coordinates are displayed, even if
CoordOff
format
is selected.
Intersection
is displayed in the bottom-left corner. To restore the free-moving
cursor, press
|
,
}
,
~
, or
†
.
dy/dx
dy/dx dy/dx
dy/dx
dy/dx
(numerical derivative) finds the numerical derivative (slope) of a function at a point,
with
H
=1
â
L
3.
To find a function’s slope at a point, follow these steps.
1. Select
6:dy/dx
from the
CALCULATE
menu. The current graph is displayed.
2. Press
}
or
†
to select the function for which you want to find the numerical
derivative.