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Using the RPN mode, the solution is accomplished by entering the equation in
the stack, followed by the variable, before entering function ISOL. Right before
the execution of ISOL, the RPN stack should look as in the figure to the left.
After applying ISOL, the result is shown in the figure to the right:
The first argument in ISOL can be an expression, as shown above, or an
equation. For example, in ALG mode, try:
The same problem can be solved in RPN mode as illustrated below (figures
show the RPN stack before and after the application of function ISOL):
Function SOLVE
Function SOLVE has the same syntax as function ISOL, except that SOLVE can
also be used to solve a set of polynomial equations. The help-facility entry for
function SOLVE, with the solution to equation X^4 – 1 = 3 , is shown next:
The following examples show the use of function SOLVE in ALG and RPN
modes:
Note: To type the equal sign (=) in an equation, use ‚Å (associated
with the \ key).
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