!titlegore@lemmy.world
(I wonder if he knows about lemmy)1 divided by 0 (a 3rd grade teacher and principal got it wrong), Reddit r/NoStupidQuestions [4:51 | Dec 02 2023 | bprp precalculus]
Submitted 11 months ago by jimmydoreisalefty@lemmy.world to videos@lemmy.world
https://www.youtube.com/watch?v=WI_qPBQhJSM
Comments
Hupf@feddit.de 11 months ago
jimmydoreisalefty@lemmy.world 11 months ago
You are not wrong, hahaha
capital@lemmy.world 11 months ago
Parent should get a conference with teacher and principal. Ask them to show you on a whiteboard how their math works.
jimmydoreisalefty@lemmy.world 11 months ago
Yes, I agree!
It is vital to be engaged with childs education!
foggy@lemmy.world 11 months ago
bprp is great.
And his ability to effortlessly use a black pen and a red pen in one hand to illustrate changes in equations by step is truly both masterful in it’s delivery and in its performance.
Much respect.
jimmydoreisalefty@lemmy.world 11 months ago
Agree!
Awesome presenter!
jimmydoreisalefty@lemmy.world 11 months ago
The Zero Ring
It’s just that if you allow it, then all numbers are zero and you get what you deserve
Actually, you CAN divide by zero. [3:51]
dohpaz42@lemmy.world 11 months ago
If I have one whole pizza, and I divide it zero times, then wouldn’t I still have one whole pizza? I.e., shouldn’t
1 / 0 = 1?BradleyUffner@lemmy.world 11 months ago
That’s not what division is though. Division is splitting something into X equal parts. If you split a pizza into 0 equal parts, how large is each part?
dohpaz42@lemmy.world 11 months ago
I’m not super great at math, and the concept of division by zero has been somewhat confusing for me. It’s also been a bane to my existence as a programmer. To me, in both scenarios, it makes sense to get back the original number, because 0 equal parts and zero inches wide leaves the original pizza untouched. But I also accept that there are much smarter folks out there who know better than I do, so
undefinedorNaNis what it is.Thanks though for explaining it!
sleepy555@lemmy.world 11 months ago
In this example, when you say “divide it zero times”, what you are really saying is “divide it by 2, zero times”.
WhoresonWells@lemmy.basedcount.com 11 months ago
So 2^0^=1.
doctorn@r.nf 11 months ago
Anything /0 is considered impossible as an agreement. There’s no actual math involved in that answer. In reality you can divide by 0, but the answer has no natural number.
How many times can you add 0 before you get 1? The answer actually is the drunk(😅) 8 or ‘infinite’, but our minds can’t grasp the very existence of infinite, so we just went with ‘impossible’.
There are ways to circumvent that added concept of some calculators when dividing by 0 anyway and it will show you “Infinite” if it is able to. I remember you could do this in C+ even, but not 100% sure anymore how. I think it was with dividing by an ever decreasing number-variable. When it reaches 0 just before the calculation, C+ didn’t default to an error, but just said ‘Infinite’. But like I said, not 100% sure anymore if that was the actual way.
Ferris@infosec.pub 11 months ago
the limit of y in 1/x=y as x approaches 0 from negative one is negative infinity. the limit as x approaches 0 from positive one is positive infinity. 1/0 is simultaneously both positive and negative infinity and is paradoxical.
doctorn@r.nf 11 months ago
One could argue that negative and possitive infinity, unlike natural numbers, boils down to the same thing, though. Just like 0, infinity technically has no + ir -.
HubertManne@kbin.social 11 months ago
I was always taught it was infinity as opposed to impossible.
addie@feddit.uk 11 months ago
Division is defined as the inverse of multiplication. The answer to one divided by zero is the same as asking which number you would multiply by zero in order to get one. No number has that property, not even infinity. So the answer is undefined.
One divided by ‘epsilon’, where epsilon represents a very tiny number, approaches infinity for ever tinier epsilons, so in some maths contexts infinity makes sense. But in general it’s a meaningless question, and so can only have a meaningless answer.
0ops@lemm.ee 11 months ago
If your counter against that is that 0 will never become 1 no matter how many you add, then that just proves ‘infinite’ correct. If it ever could, it wouldn’t be infinite…
You’re confusing infinity for unreal numbers. Infinity and negative infinity are not real numbers, but not all unreal numbers are infinity or negative infinity.
If you’re strictly adding zeros, then adding infinite zeros nets you zero. If adding zero once didn’t change the result, then adding it infinite times won’t either. If you need to add enough zeros to get to 1, that number doesn’t exist - but that doesn’t mean that it’s infinity, it means that there’s no solution. Infinity is a placeholder for “larger a real number than you can imagine”, but when you multiply that by zero, the magnitude of infinity is a moot point because you have zero infinities.
In calculus if you’re curious, you’re usually not strictly adding zero itself like above but instead adding values that approach zero. In that case, 0*infinity really “a very small number times a really big number”, and that is called an “indeterminate form”. In that case you may try rearranging it to solve
doctorn@r.nf 11 months ago
You say it yourself. If you jeep adding infinite zeros you will never get 1, hence the ‘divided by 0’ part.
Also, 0 is technically not a number either, it’s the concept of the absence of one. You can’t count 0 things. That doesn’t mean we don’t use it, thogh. It’s just less hard to imagine and closer to our basic calculations than infinity is.
Destraight@lemm.ee 11 months ago
Reddit? This is lemmy. Why are we talking about reddit? I thought the reddit migration was over? Hasn’t enough time passed already for the sensible users to switch from reddit to lemmy?
LemmyIsFantastic@lemmy.world 11 months ago
I think you mean the extremists. The sensible ones stayed.
andrewta@lemmy.world 11 months ago
So since you are here that makes you an extremist?
jimmydoreisalefty@lemmy.world 11 months ago
Undefined?
Undefinable.
Dividing by zero? [9:08 | Sep 21 2014 | Eddie Woo]
jimmydoreisalefty@lemmy.world 11 months ago
Time stamp: 2:30 starts to divide 1 by 0
DaCookeyMonsta@lemmy.world 11 months ago
I mean, it’s the easiest disproof to say if 1/0 = 0, then 0*0 must equal 1, which it obviously does not as it would violate the zero property.
jimmydoreisalefty@lemmy.world 11 months ago
Awesome!