At 04:41 PM 3/10/2012, Chris Roper wrote:
>I tried it in Realcalc on Android in RPN mode using the same method as
>Dwayne and got ZERO as the result, switching to Algebraic mode it gives 9.
>Now I have lost faith in my favorite calculator, I get the wrong answer
>either way.

How many levels of stack does Realcalc allow?  You may have run out=20
of stack space.

dwayne

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Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

--=20
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