Dy/dx – Texas Instruments TI-83 PLUS User Manual
Page 155
TI-83 Plus
Function Graphing
152
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
(numerical derivative) finds the numerical derivative (slope) of a
function at a point, with
H
=1
âL
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.
3. Press
|
or
~
(or enter a value) to select the
X
value at which to
calculate the derivative, and then press
Í
.
The cursor is on the solution and the numerical derivative is displayed.