HP 39gs Master Guide

Choose the aplet
8
T
T
H
H
E
E
F
F
U
U
N
N
C
C
T
T
I
I
O
O
N
N
A
A
P
P
L
L
E
E
T
T
The Function aplet is probably the one that you will use most of all. It allows you to:
• graph equations
• find intercepts
• find turning points (maxima/minima)
• find areas under curves
• find areas between curves
• find gradients
• find derivatives algebraically
• find simple integrals algebraically
• evaluate functions at particular values
• graph and evaluate algebraically expressions such as f(g(x)) or f(x+2)
The first step for any aplet is to choose it in the
APLET LIBRARY.
Press the
APLET key and you will see something similar to the screen on
the right. Use the arrow keys to move the highlight up or down until the
Function aplet is selected. Now, looking at the list of context sensitive
functions at the bottom of the screen, you should see labels of
and
.
Press the key under
first. You’ll see the message shown right -
press the
key. The reason for doing this is to clear out any
functions that you may have put in there while playing around, and so to
make sure that what you see will be the same as the screen snapshots.
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HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm