- number ^ power issue? HP Prime
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05-28-2014, 04:58 PM
Post: #1
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- number ^ power issue? HP Prime
Hi,
I did not notice following with prior HP Prime firmware: -3^2 yields -9 but (-3)^2 yields +9 I hope I am missing something here, otherwise this is a problem. |
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05-28-2014, 05:09 PM
Post: #2
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RE: - number ^ power issue? HP Prime | |||
05-28-2014, 05:09 PM
Post: #3
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RE: - number ^ power issue? HP Prime
Both results appear to be correct.
1. how would you evaluate 0-3^2? 2. the square of a negative number is positive I hope *I* have not missed anything here. |
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05-28-2014, 05:15 PM
(This post was last modified: 05-28-2014 05:17 PM by Thomas Radtke.)
Post: #4
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RE: - number ^ power issue? HP Prime
(05-28-2014 05:09 PM)Jonathan Cameron Wrote: I think this must due to precedence of operators. The Prime (now) thinks that unary negation is lower precedence than exponentiation.Please have a look here: http://en.wikipedia.org/wiki/Order_of_operations In written or printed mathematics, the expression −3^2 is interpreted to mean −(3^2) = −9,[3] [...] [3] Allen R. Angel, Elementary Algebra for College Students 8/E; Chapter 1, Section 9, Objective 3 |
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05-28-2014, 05:25 PM
Post: #5
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RE: - number ^ power issue? HP Prime
48 and 50 do the same in an algebraic obj...
TW Although I work for HP, the views and opinions I post here are my own. |
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05-28-2014, 05:29 PM
Post: #6
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RE: - number ^ power issue? HP Prime | |||
05-28-2014, 06:01 PM
Post: #7
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RE: - number ^ power issue? HP Prime
(05-28-2014 05:29 PM)DrD Wrote: http://www.wolframalpha.com/input/?i=-3^2Same on Google, same on Bing. |
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05-28-2014, 06:11 PM
Post: #8
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RE: - number ^ power issue? HP Prime
Thanks all - yes the Prime (and other calculators) are doing this correctly.
My error. |
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05-28-2014, 07:05 PM
Post: #9
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RE: - number ^ power issue? HP Prime
(05-28-2014 06:11 PM)CR Haeger Wrote: Thanks all - yes the Prime (and other calculators) are doing this correctly. Woohoo! I get to win for once! ![]() TW Although I work for HP, the views and opinions I post here are my own. |
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05-28-2014, 08:17 PM
Post: #10
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RE: - number ^ power issue? HP Prime
(05-28-2014 07:05 PM)Tim Wessman Wrote:(05-28-2014 06:11 PM)CR Haeger Wrote: Thanks all - yes the Prime (and other calculators) are doing this correctly. Well don't let it go to your head ![]() Seriously, Tim. Thank you for all you do and for communicating information with us. Without you and Cyrille I suspect there would be no new RPN calculators from HP and certainly no RPN mode in the Prime. Steve Simpkin |
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05-28-2014, 08:18 PM
Post: #11
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RE: - number ^ power issue? HP Prime | |||
05-28-2014, 10:37 PM
Post: #12
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RE: - number ^ power issue? HP Prime
(05-28-2014 07:05 PM)Tim Wessman Wrote:(05-28-2014 06:11 PM)CR Haeger Wrote: Thanks all - yes the Prime (and other calculators) are doing this correctly. Don't worry, there are a lot more things the Prime can do correctly that I still wouldn't recognize as being correct. Blame my out of date firmware... |
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