Just ask your calculator

04122017, 01:20 PM
Post: #1




Just ask your calculator
Found on a book preparing for nationwide tests after high school. Wikis are great, Contribute :) 

04122017, 05:13 PM
Post: #2




RE: Just ask your calculator
Is that CAS or Home mode?
Home gives an error. CAS gives infinity on the Prime. For my HP71 it depends on the flag settings. If you work hard you can get NaN. 

04122017, 07:35 PM
Post: #3




RE: Just ask your calculator
The quote was from a McGraw Hill publication. Not related to any calculator manual.
Wikis are great, Contribute :) 

04122017, 07:43 PM
Post: #4




RE: Just ask your calculator
Sorry, forgot the 8^)


04142017, 01:20 AM
Post: #5




RE: Just ask your calculator
(04122017 05:13 PM)KeithB Wrote: For my HP71 it depends on the flag settings. If you work hard you can get NaN. On an HP71B, after TRAP(IVL,2), 0/0 yields NaN, but 4/0 yields Inf. How do you get 4/0 to yield NaN? <0ΙΈ0> Joe 

04172017, 03:56 PM
Post: #6




RE: Just ask your calculator
Have a bad memory? I thought every /0 yielded NaN.


04182017, 08:06 AM
Post: #7




RE: Just ask your calculator
Nope. Only 0/0 is undetermined mathematically.
x/0 for real value x!=0 is always +INF or INF depending on the sign of x. 

04182017, 11:42 AM
Post: #8




RE: Just ask your calculator
(04182017 08:06 AM)grsbanks Wrote: Only 0/0 is undetermined mathematically. x/0 for real value x!=0 is always +INF or INF depending on the sign of x. Could you cite your source, such as at MathonlyMath under Properties of Division, Property 4 is the following Note: In order to divide 6 by 0, we must find a whole number which when multiplied by 0 gives us 6. Clearly, no such number can be obtained. We, therefore, say that division by 0 is not defined. BEST! SlideRule 

04182017, 01:10 PM
(This post was last modified: 04182017 01:11 PM by pier4r.)
Post: #9




RE: Just ask your calculator
(04182017 08:06 AM)grsbanks Wrote: Nope. Only 0/0 is undetermined mathematically. For the little that I know, this should be valid only with limits. I mean : the divisor (epsilon) approaching to zero in the formula x/epsilon Wikis are great, Contribute :) 

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