HP -225 Owner's Manual page 99

7
The Equation Library
The equation library is a list of equations that are permanently stored
in the HP-225; clearing equations or all of memory does not affect the
library.
Doing Calculations With Library Equations
To use a library equation:
1-
Select the equation by displaying it: press [l[LIBRARY], then [V]
or (4], if necessary, to roll through the library list. You can use
{~} (the key) to see the rest of equations longer than 12
characters.
Evaluate or solve the equation:
B Use to evaluate the equation for a variable that is by
itself on the left side of the equation. (The ideal gas law, thin
lens, radioactive decay, and TVM equations cannot be evalu-
ated.) If necessary see "Instructions for Using [EVAL]" on
page 75.
B Use @[SOLVE] to solve the equation for any variable. If neces-
sary, see "Instructions for Using [SOLVE]" on page 77.
7: The Equation Library 91