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This 88 message thread spans 3 pages: 88 ( [1] 2 3 > >     
Google caculator 1 / 0 = 0?!
1 / 0 = undefined. a Bug
coolma




msg:744415
 3:37 pm on Apr 15, 2005 (gmt 0)

I love google. so i test all the functions out that provided by google.
But one day my friend asked me what is 1 / 0? I know it but i can not remember how to say it,the teminology. What I was sure is it is undefined or should be error(computer science students always treat it as a runtime error)
and then I searched on Google , its caculator function which is the same place as keyword input textfield, just type 1 / 0. and search it will give you the result. I was supprised that Google got me 1 / 0 = 0, as a science student, I am sure it is wrong. So I e-mail google team to let them know this arithmetic bug. (was excited) After a couple of days I got mail from them with "Thanks" , pretty good aye. But until now it is still not fixed.
I asked my friend who is good at math about the name of this "error".
Then I know It is undefined. anything / 0 = undefined.!

 

Brett_Tabke




msg:744416
 1:41 pm on Apr 19, 2005 (gmt 0)

lol - nice catch!

bloke in a box




msg:744417
 2:37 pm on Apr 19, 2005 (gmt 0)

It's mathematically impossible to divide by zero.

This [google.com] explains why. :)

Try dividing by zero in Windows Calculator or Excel etc, you'll get the same error. :)

Lord Majestic




msg:744418
 3:06 pm on Apr 19, 2005 (gmt 0)

It's mathematically impossible to divide by zero.

I beg to differ -- mathematically pretty much everything is possible: I believe 1/0 should be positive infinity -- its just computers and their non-mathematically inclined users will have difficulty grasping how big is the infinity ;)

arubicus




msg:744419
 3:45 pm on Apr 19, 2005 (gmt 0)

Agree with LORD. It is not impossible just indeterminate.

Can infinity actually be an answer?

No it is an abstract concept (not a real number) so in this case cannot be used as an answer either. Dividing by zero is undefined but does in no way mean that it infinate.

Absolut




msg:744420
 8:22 pm on Apr 19, 2005 (gmt 0)

Infinity is a concept, as is 1/0.

The closer the divisor gets to reaching zero, the closer the result comes to reaching infinity.

This is pure mathematics, people seem to be making the mistake that this are real integers.

bird




msg:744421
 9:37 pm on Apr 19, 2005 (gmt 0)

Well, 0 is as good an approximation to infinity as any other number... ;)

hdpt00




msg:744422
 10:01 pm on Apr 19, 2005 (gmt 0)

0 is a pretty bad guess of infinity, in my engineering perspective.

Lord Majestic




msg:744423
 10:05 pm on Apr 19, 2005 (gmt 0)

Well, 0 is as good an approximation to infinity as any other number... wink

No it is not: 0, 1 or even googol are all much much smaller than (positive) infinity.

mole




msg:744424
 11:10 pm on Apr 19, 2005 (gmt 0)

So 1/0 should be several googles?

Lord Majestic




msg:744425
 11:15 pm on Apr 19, 2005 (gmt 0)

So 1/0 should be several googles?

Lets just say that the infinity (which is the correct answer to 1/0 problem) is bigger than googol and google taken together ;)

arubicus




msg:744426
 12:24 am on Apr 20, 2005 (gmt 0)

"Lets just say that the infinity (which is the correct answer to 1/0 problem)"

It isn't the correct answer. If 1/0 = infinity then what is 2/0. Twice infinity? Also if this is the case then you are saying that infinity x 0 = 1?

So any real number divided by zero = infinity(not a real number) then:

1/0 = infinity
2/0 = infinity

By this definition 1/1 should equal 2/1

[edited by: arubicus at 12:29 am (utc) on April 20, 2005]

theBear




msg:744427
 12:28 am on Apr 20, 2005 (gmt 0)

Here you go:

Replace the two * with tt.

[mathforum.org...]

[edited by: ciml at 9:12 am (utc) on April 22, 2005]
[edit reason] No unlinked URLs please. [/edit]

Lord Majestic




msg:744428
 12:30 am on Apr 20, 2005 (gmt 0)

It isn't the correct answer.

It is the correct answer to 1/0 problem, and it also happens to be the correct answer to 2/0 problem ;)

By this definition 1/1 should equal 2/1

Nope: 1/1 is not equal 2/1, where as 1/0 is equal (has same result) as 2/0. :)

Also if this is the case then you are saying that infinity x 0 = 1?

Now this is a good question that I can't remember exact answer to, but we can always google it ;)

arubicus




msg:744429
 12:49 am on Apr 20, 2005 (gmt 0)

"Nope: 1/1 is not equal 2/1, where as 1/0 is equal (has same result) as 2/0. :)"

The result would be nonsense because of 1/1 would have to = 2/1 if 1/0 has the same result as 2/0 if infinity were used as an answer to 2/0 = (notice the equal sign) and 1/0 both. Infinity cannot be a direct defined answer to both unless infinity itself is defined first.

Then I ask you how much is 2/0? Would it be twice infinity? Is that possible? Or is it the same? If it is the same then again 1/1 should also be equal to 2/1.

If infinity x 0 = 0 then where do you get 1 or 2 uless you substitute a REAL number! Hence again you are not defining what REAL number infinity is.

Also you are breaking the rule for all real numbers (I noticed you can find it on the website above also) a(b/a) = b. If a = 2 and b = 4 then 2(4/2) = 4

With the stated rule...

a = 0 and b = 1

0(1/0) should equal 1 not infinity.

Lord Majestic




msg:744430
 1:04 am on Apr 20, 2005 (gmt 0)

Also you are breaking the rule for all real numbers

Infinity is an abstract concept and its a cool answer to 1/0 problem :)

Hey, don't take it with me, take it with Abstract Algebra , you might want to search for "Limits and division by zero" on Google, plenty of interesting stuff :)

arubicus




msg:744431
 1:55 am on Apr 20, 2005 (gmt 0)

I am not saying infinity cannot be used in algebra in things such a limits (where you are defining a bit more) just not in this instance.

Take a pie and divide it zero ways. When you are done have you accomplished anything?

Lord Majestic




msg:744432
 1:57 am on Apr 20, 2005 (gmt 0)

Take a pie and divide it zero ways

Can't say about zero ways, but when my sister used to divide it 2 ways, I always gotten zero - explain that! ;)

arubicus




msg:744433
 2:13 am on Apr 20, 2005 (gmt 0)

LOL!

Sounds like my wife!

A woman thig is the only explaination.

Lord Majestic




msg:744434
 2:26 am on Apr 20, 2005 (gmt 0)

A woman thig is the only explaination.

You said it -- you just gotto believe it regardless of whether it is supported by any rational material explanation. ;)

TheRookie




msg:744435
 2:28 am on Apr 20, 2005 (gmt 0)

Hey, don't take it with me, take it with Abstract Algebra , you might want to search for "Limits and division by zero" on Google, plenty of interesting stuff

But the limit of 1/0 isn't the same as the answer of 1/0.

Lord Majestic




msg:744436
 2:34 am on Apr 20, 2005 (gmt 0)

But the limit of 1/0 isn't the same as the answer of 1/0

Its a cool, google-like, better answer that will make whoever seen it deep into magical world of abstraction that helped created computers as we know it. Is it not worth returning infinity as the answer rather than stupid "undefined"?

TheRookie




msg:744437
 2:36 am on Apr 20, 2005 (gmt 0)

Its a cool, google-like, better answer that will make whoever seen it deep into magical world of abstraction that helped created computers as we know it. Is it not worth returning infinity as the answer rather than stupid "undefined"?

Well, it isn't worth making it infinity it for a student using Google's calculator to answer math problems which may be graded! :-/

But having it = 0 doesn't help, either.

arubicus




msg:744438
 2:37 am on Apr 20, 2005 (gmt 0)

I don't know I like the sound of indeterminate better:)

Lord Majestic




msg:744439
 2:43 am on Apr 20, 2005 (gmt 0)

Well, it isn't worth making it infinity it for a student using Google's calculator to answer math problems which may be graded! :-/

Hey, if you use Google (instead of knowing result straight away) to determine what is the result of 1/0 then you deserve the grade you will get ;)

Anyhow, its all very academical and this thread might just loop into infinity, so to wrap it up I personally favour the infinity as the right answer to the question, but I appreciate that most people would prefer to see something else.

arubicus




msg:744440
 2:55 am on Apr 20, 2005 (gmt 0)

are we going to infinity or 0 nowhere or is this convo undefined in direction? LOL OK I am done.

Peace everyone!

Lord Majestic




msg:744441
 3:02 am on Apr 20, 2005 (gmt 0)

Peace everyone!

Yeah, tell your wife that my sister says hi -- they are clearly from the same race or something ;)

arubicus




msg:744442
 3:11 am on Apr 20, 2005 (gmt 0)

Bunch of pie eating aliens!

woop01




msg:744443
 3:32 am on Apr 20, 2005 (gmt 0)

ICK

Reading some of the results from that Google search brought up "L'Hopital's Rule". I have honestly had a horror movie like response to just seeing that term.

bird




msg:744444
 2:18 pm on Apr 20, 2005 (gmt 0)

> Well, 0 is as good an approximation to infinity as any other number... wink

No it is not: 0, 1 or even googol are all much much smaller than (positive) infinity.

Since all those number are an infinite distance away from infinity, each of them is equally suited as an approximation. That doesn't mean they're good approximations, just that there are no better ones... ;)

It isn't the correct answer. If 1/0 = infinity then what is 2/0. Twice infinity?

Yes. Just that infinity multiplied by any non-zero number is again infinity.

Also if this is the case then you are saying that infinity x 0 = 1?

No. Any number (including infinity) multiplied by zero results in zero:
infinity * 0 = 0

You need to look at zero and infinity as opposed concepts, and it will eventually start to make sense. At both ends of the scale there are a few special cases to deal with.

This 88 message thread spans 3 pages: 88 ( [1] 2 3 > >
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