The Formula List; The Solve Menu - HP -18C Owner's Manual

The Formula List
The formulas you enter are stored into a formula list. The formula list
can contain as many formulas as you'd like, limited only by the
amount of unused calculator memory.
The SOLVE Menu
To display the
SOLVE
menu from the
MAIN
menu, press
1mJDI .
If you
haven't previously used the
SOLVE
menu, the formula list is empty
and line 3 is ready to accept the formula you type.
Figure 9·2. The Empty Formula List
TYPE A FORMULAi
PRESS {CALC) Ot-::
n=amDIlmD
L
~ist
pointer
[INPUT]
Cursor
I
If the formula list already contains one or more formulas, the display
will look different (see figure 9-3). The HP-18C displays a portion of
the formula list. The list pointer points to the current formula-the
formula the solver uses to create the custom menu when you press
. . . Lines 1 and 2 display the two formulas that precede the cur-
rent formula. You can use
[!J
or
[!J
to designate a different current
formula.
Figure 9·3. The Formula List With Several Stored Formulas
Formulas preceding
PPSyxLxW79=COST }
the current formula
PIANOS: PROF I T=PR I CExQU
(first 22 characters)
Q
.D I SCTPR I CE: PR I CEx I NVO I
Tcurrent formula (first
mHmDllmD
22 characters)
List pointer
9: The Formula Solver 129