Why is this not 0 on 50g or Prime?
07-18-2018, 08:49 PM (This post was last modified: 07-18-2018 09:16 PM by Vtile.)
Post: #21
 Vtile Senior Member Posts: 406 Joined: Oct 2015
RE: Why is this not 0 on 50g or Prime?
(07-18-2018 08:31 PM)BartDB Wrote:
(07-18-2018 04:05 PM)Vtile Wrote:  (a/b)/(a/b) = 1
...
(2a/b)*(b/a) = 2

Not for all values of a and b.

More generally $$\frac{x}{x}= 1\: for \: all \:x\neq 0$$

The discontinuities must always be excluded. For example in equations with fractions, the points where the denominator(s) = 0 must be excluded (have exception handling).
Yes you are correct many such cases done with proper accepted rules (edit. btw. again exception in definition), but iirc isn't NaN (as infinity many results/logic brakepoint/undefined infinity)* and +-inf (numerical infinity)* and +-0 (infinitesimals/zero as inverse of infinity) used for such to continue the analysis in logical way.

*as I see/understand them.
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 Messages In This Thread Why is this not 0 on 50g or Prime? - Joe Horn - 07-16-2018, 03:35 PM RE: Why is this not 0 on 50g or Prime? - Voldemar - 07-16-2018, 04:56 PM RE: Why is this not 0 on 50g or Prime? - ijabbott - 07-16-2018, 05:05 PM RE: Why is this not 0 on 50g or Prime? - BartDB - 07-16-2018, 05:22 PM RE: Why is this not 0 on 50g or Prime? - Valentin Albillo - 07-16-2018, 05:38 PM RE: Why is this not 0 on 50g or Prime? - rprosperi - 07-17-2018, 12:37 PM RE: Why is this not 0 on 50g or Prime? - Joe Horn - 07-17-2018, 03:51 AM RE: Why is this not 0 on 50g or Prime? - KeithB - 07-17-2018, 01:20 PM RE: Why is this not 0 on 50g or Prime? - rprosperi - 07-18-2018, 12:40 AM RE: Why is this not 0 on 50g or Prime? - Valentin Albillo - 07-18-2018, 12:45 AM RE: Why is this not 0 on 50g or Prime? - rprosperi - 07-18-2018, 01:23 AM RE: Why is this not 0 on 50g or Prime? - Vtile - 07-17-2018, 10:33 PM RE: Why is this not 0 on 50g or Prime? - Claudio L. - 07-17-2018, 11:12 PM RE: Why is this not 0 on 50g or Prime? - KeithB - 07-18-2018, 01:41 PM RE: Why is this not 0 on 50g or Prime? - Vtile - 07-18-2018, 04:05 PM RE: Why is this not 0 on 50g or Prime? - ijabbott - 07-18-2018, 05:18 PM RE: Why is this not 0 on 50g or Prime? - Vtile - 07-18-2018, 05:45 PM RE: Why is this not 0 on 50g or Prime? - BartDB - 07-18-2018, 08:31 PM RE: Why is this not 0 on 50g or Prime? - Vtile - 07-18-2018 08:49 PM RE: Why is this not 0 on 50g or Prime? - Claudio L. - 07-19-2018, 06:28 PM RE: Why is this not 0 on 50g or Prime? - klesl - 07-18-2018, 06:34 PM RE: Why is this not 0 on 50g or Prime? - Vtile - 07-18-2018, 07:01 PM

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