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In most cases, this is all you will need to know about how the solver
works.
However, there are certain types of formulas that are more
difficult to
solve. If,
during the
calculation,
the history stack is over-
written by sets of changing numbers (see figure B-1 on page 174), you
should read the
section,
How the Solver Works
starting on page
137.
Clearing User-Variables
Clearing user-variables sets them equal to 0 and clears the history
stack. To clear a set of user-variables associated with a particular cus-
tom menu, display the custom menu and press
.1
CLEAR ALL
I.
User-variables are also cleared when the formula is edited.
Viewing Long Formulas
The formula list shows only the first 22 characters of a formula. To
view the entire current formula, press
u..
The entire formula (up
to 68 characters) is displayed (see figures 9-5 and
9-6).
If the formula
is longer than 68 characters, use [I] to see the rest of the formula
.
When you are done viewing the formula, press
II1II.
132
9: The Formula Solver
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