HP 49g Graphing Calculator - Manual (Page 112)

Introduction
This chapter explains how to use the main featiu'es of the HP 49G’s
computer algebra system to work with expressions.
It describes how to:
® factorize, expand, and simplify expressions
® use the calculus functions to perform differentiations and integrations
® perform a differentiation in step-by-step mode.
You can use either Equation Writer or the command line to create and edit
expressions. The examples in this chapter do not explain how to create
the expressions. See chapter 2, “Basic operation”, and chapter 3, “Creating
and editing expressions”, for information on how to do this.
Configuring the CAS
The HP 49G has powerful symbolic capabilities. It can retrum numeric or
symbolic solutions to problems involving algebraic objects. You use the
CAS Modes input fonn to set the way that the HP 49G deals with
calculations, and how it performs symbolic manipulation.
To configure the CAS:
1. Press (MODE) to display the Calculator
Modes input fonn, then press
CAS.
The
CAS Modes input fonn is displayed.
2. Use the arrow keys to navigate around the
options.
® For those options that require a value,
enter the value and press OK to apply it to the option.
® For the other options, select or de-select them by pressing
CHK.
3. Wlren you have configured the CAS modes, press
OK
twice to return to
the default screen.
On the CAS Modes input fonn, two key settings determine how the
HP 49G handles symbolic solutions. These are the Numeric option and the
Approx option.
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Page 5-2 Working with expressions