HP 48G Series Quick Start Manual page 63
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Also See for 48G Series:
- Advanced user's reference manual (764 pages) ,
- User manual (613 pages) ,
- Quick start manual (116 pages)
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Lesson 18: Solving for a Variable—
Symbolically
The HP 48 also allows you to isolate a variable symbolically—that is,
rearrange an expression so that the desired variable is isolated on one
side of the equal sign. Once a variable is isolated, it is easy to save the
rearranged expression as its definition.
Example:
Solve for Ty in the following heat transfer equation, then
create variable TH containing the resulting equation:
q
Uv=-——1
A (Ty — Tp)
Step 1:
open the SYMBOLIC application and select I=zil
2a
@vio
OOO
2% ISOLATE A YARIAELE 23
EXPE:
VAR:
RESULT: Symbol ic
_ PRINCIPAL
ENTER EXPRESSION
EDIT CHOOS] | JEANWGL|Ok
Step 2:
Create and enter the equation.
(EQUATION)
ISOLATE A VARIABLE 33
UEC) RE)
3 U=0 CAs CTH-TL
YAR:
AX @&E)
RESULT: Symbolic PRINCIPAL
(@)(@) TH (=) TL
ENTER EMPRESSION
ECT [CHOOSE]|[CAMEL]OK
Step 3:
Specify the variable of solution and solve for it.
WV @T @H
Ls
TH=OALRTL
VECTR|MATE]LISTHYPREALEASE]
Solving Equations
5-7
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