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Re: Please remind me why -3^2 = -9
Posted:
Oct 19, 2012 5:15 PM
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On Oct 19, 2012, at 12:22 PM, Clyde Greeno wrote:
> A Mackey-prompted extension:
>
> "Below, insert parens to show two reasonable interpretations of '-
> x^y' ... and circle the one that is most commonly used in
> mathematical literature:
> -x^y or -x^y "
> ... then illustrate the difference, by evaluating both formulas, by
> choosing a value for x, and a value for y, and using those values in
> each of your two parenthesized formulas. Which of those values is
> displayed by your calculator ... with and without your parens "
Indeed, even nicer.
I find it interesting that I very rarely have that kind of idea. But
then that's why people collaborate. Too bad, though, that mathematics
"educators" usually don't even want to consider the possibility.
Regards
--schremmer
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