HP 48gx User Manual

Lesson 9: Arithmetic with Symbols
Arithmetic using symbolic variables is very much like arithmetic using
numbers. You can make symbolic calculations on the stack the same
way you make numeric calculations—except you use algebraic objects
(and tick-mark delimiters) instead of just numbers.
—axr
Example: Use symbolic math to create the equation y = 1 —e¢
Step 1: Enter y and the number 1.
CLEAR) :
O@@Y ETE | EER) |
Step 2: Enter the argument —az.
DOPE ®D@X
: = L
THATIEHAT] *@ [30m] | [APPLY]
Step 3: Calculate e=9%,
J: 1
ct 1
1: ERP -a%w)
FETT EE NE El I CT
Step 4: Subtract to calculate 1 — e=%%.
(3) 2 1,1!
I: 1-ERP (=a)
[+HAT[4HAT] #0 [*#@w] | [RPPLY|
Step 5: Form an equation from the two expressions.
&=)
2
1: 'y=1-ExP(-a%u)’
ETEETL EE ETT EO CT
Arithmetic 3-9

HP 48gx Specifications

General

Model	HP 48gx
Type	Graphing Calculator
Display Type	LCD
Display Size	131x64 pixels
Memory	128 KB RAM
Expandable Memory	Yes, via expansion cards
Release Year	1993
Processor	Saturn
Programming Language	RPL
Power Supply	3x AAA batteries
Weight	255 g (9 ounces)