HP 48G Series User Manual

Lesson 27: Finding Slope, Tangents, and
Critical Points
The following examples show you other kinds of analysis you can
perform on the currently plotted function.
Example: Using the same polynomial you just plotted in the
previous lesson (X° + X* — 5X3 — 2X? + X — 4), find the
slope at # = —0.4 and draw a tangent line to the function
at x = 0.3.
Step 1: Turn on TRACE mode and move the cursor using the («)
and (») keys.
(to redisplay the menu)
PICT TRADE
(«€) and (») as needed
L. §
ETRE Er IEE FETE ETT
Step 2: Display the cursor coordinates and move the cursor over
until the z-coordinate equals -0.4.
nr
<
as
needed
|
|
|
oo
1
™
n= ¥: -Y4.38464
Step 3: Find the slope.
(to redisplay the menu)
:
SLOPE: 07d
tting Equations and Analyzing Graphs 6-15

HP 48G Series Specifications

General

Model	HP 48G Series
Type	Graphing Calculator
Display Type	LCD
Display Size	131x64 pixels
Programming Language	RPL (Reverse Polish Lisp)
Memory	32 KB RAM
Processor	Saturn
Power Supply	3x AAA batteries
Connectivity	Infrared (IR)