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Example of flag setting: general solutions vs. principal value
For example, the default value for system flag 01 is
General solutions
. What
this means is that, if an equation has multiple solutions, all the solutions will be
returned by the calculator, most likely in a list. By pressing the soft
menu key you can change system flag 01 to
Principal value
. This setting will
force the calculator to provide a single value known as the principal value of
the solution.
To see this at work, first set system flag 01 (i.e., select
Principal Value
). Press
@@OK@@
twice to return to normal calculator display. We will try solving a
quadratic equation solution, say, t
2
+5t+6 = 0, with command QUAD.
Algebraic mode
Use the following keystroke sequence:
‚N~q
(use the up and down
arrow keys,
—˜
, to select command QUAD) , press
@@OK@@
.
To enter the equation as the first argument of function QUAD, use the
following keystrokes:
‚O~
„t
Q2™+5*~
„t+6——
‚Å0`
‚í ~
„t`
The result is:
Now, change the setting of flag 1 to
General solutions
:
H
@FLAGS@
@@OK@@ @@OK@@
. And try the solution again:
——``
. The solution
now includes two values:
RPN mode
First set system flag 01 (i.e.,
Principal Value
). Press
@@OK@@
twice to return to
normal calculator display. Then, type the quadratic equation as follows:
@
CHK@
@
CHK@