HP 48g Graphing Calculator - Manual (Page 353)

Solver Menu Keys (continued)
Operation Key Action
Solve for all
S) Pil-L
Creates variables if necessary and
solves for all variables not
user-defined (or as many as
possible).
Progress catalog
O H1- !-■
Shows information about last
solution.
User-defined M U S E Sets states to user-defined for
variable or list of variables on the
stack.
Calculated Sets state to not user-defined
(calculated result) for variable or
list of variables on the stack.
25
The menu labels for the variable keys are white at first—they change
during the solution process as described below.
Because a solution involves many equations and many variables,
the Multiple-Equation Solver must keep track of variables that are
user-defined and not defined—those it can’t change and those it can.
In addition, it keeps track of variables that it used or found during the
last solution process.
The menu labels indicate the states of the variables. They’re
automaticallji adjusted as you store values and solve for variables. You
can check that variables have proper states when you supply guesses
and find solutions.
Notice that »i marks the variables that were used in the last solution—
their values are compatible with each other. Other variables may 7iot
have compatible values because they weren’t involved in the solution.
The Equation Library 25-7