Interesting question. Does 1.99999999999... = 2

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Originally Posted by N!ck

1.99 recurring and 2 are two completely different numbers. That does not mean that they are not equal to each other. Here is the way that I always prove this sort of thing to people.

1.99 recuring is 1.999999............. forever yes?

Call this 1.99 recurring x.

Multiply 1.99 recurring by 10, thus giving you 10x.

x = 1.99999999999999.........
10x = 19.9999999999999........

Now minus x away from 10x leaving behind 9x.

10x = 19.9999999999999........
- x = 1.99999999999999.......

= 9x = 18

If 9x = 18 then x = 2.



It's the same concept that that there is only 179.99 recurring degrees in a triangle, making it possible for you to have a two sided triangle ;).

But x also = 1.99 recurring :P.

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Yeah that is a good example.

I still cannot envision the triangle with two sides though.

Maybe a link to a picture or something.

+rep

Quote:

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Originally Posted by N!ck

1.99 recurring and 2 are two completely different numbers. That does not mean that they are not equal to each other. Here is the way that I always prove this sort of thing to people.

1.99 recuring is 1.999999............. forever yes?

Call this 1.99 recurring x.

Multiply 1.99 recurring by 10, thus giving you 10x.

x = 1.99999999999999.........
10x = 19.9999999999999........

Now minus x away from 10x leaving behind 9x.

10x = 19.9999999999999........
- x = 1.99999999999999.......

= 9x = 18

If 9x = 18 then x = 2.

But x also = 1.99 recurring :P.



It's the same concept that that there is only 179.99 recurring degrees in a triangle, making it possible for you to have a two sided triangle ;).

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You can do that with a lot of things.

1.9999... and 2 are different numbers. 1.999 is NEARLY 2. NOT 2.

And dont believe everything you read on the net.

1.9999.. is a number.

I don't think it is possible to accurately draw one, because the sides are infinately close together.

Edit: @ Saurav - I never said 1.99 recurring was 2. I said it was equal to 2, which can be proven in the method i have shown.

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Originally Posted by N!ck

I don't think it is possible to accurately draw one, because the sides are infinately close together.

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It's impossible because a triangle needs to have 3 sides, otherwise it's just a line with a corner in it - an angle.

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Originally Posted by Saurav

You can do that with a lot of things.

1.9999... and 2 are different numbers. 1.999 is NEARLY 2. NOT 2.

And dont believe everything you read on the net.

1.9999.. is a number.

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that is true that you shouldnt believe everything you see on the internet.

But this is on the internet with tons of reasons why and there are other pages on the internet talking about the same thing.

If one internet page said that 1.999... = 2 then I wouldn't believe it. But with the reasons and other pages you can trust it.

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Originally Posted by Aflux

It's impossible because a triangle needs to have 3 sides, otherwise it's just a line with a corner in it - an angle.

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Yeah I am still confused about this.

I cant find anything about it on google.

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Originally Posted by BL!NKEY

I just posted this as a question so people would argue and eventually everyone would understand.

It turned out that no one here knows enough about math and infinities to understand.

Read what wikipedia says and you might understand. If you don't believe wikipedia then search google and see the hundreds of reasons why it is true.

http://en.wikipedia.org/wiki/Proof_t...99..._equals_1

This is not a debate, it is cool mathematical thing that is kind of hard to realize at first.

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I find it irritating that you say this not a debate, especially as you worded the title of the thread as a question, suggesting that you wanted to hear other people's views etc.

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Originally Posted by Concentric2

I find it irritating that you say this not a debate, especially as you worded the title of the thread as a question, suggesting that you wanted to hear other people's views etc.

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Yeah, I thought wording the title that way would lead to discussions and people talking about it. Then someone would show some ways why it is true and people would understand

It just turned out to be everyone telling me that it is wrong and no one would take the time to understand it.

So I posted the link showing why it is true but people still didn't believe it.

I wanted to hear other peoples views and watch them as they understand how it works.

Instead there are people claiming that it is totally wrong when there are pages written by people who are way better at math then anyone on this forum explaining how it is right.

If someone had a masters in mathematics and wanted to debate it then I would have no problem. I would actually enjoy watching what they say.

But the people who come on here and just go

1.9999999=1.9999999 not 2 duhhhh

annoy me because they are not even trying to understand it.

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Originally Posted by BL!NKEY

Yeah, I thought wording the title that way would lead to discussions and people talking about it. Then someone would show some ways why it is true and people would understand

It just turned out to be everyone telling me that it is wrong and no one would take the time to understand it.

So I posted the link showing why it is true but people still didn't believe it.

I wanted to hear other peoples views and watch them as they understand how it works.

Instead there are people claiming that it is totally wrong when there are pages written by people who are way better at math then anyone on this forum explaining how it is right.

If someone had a masters in mathematics and wanted to debate it then I would have no problem. I would actually enjoy watching what they say.

But the people who come on here and just go

1.9999999=1.9999999 not 2 duhhhh

annoy me because they are not even trying to understand it.

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Because it'll always be 0.1 off of 2.

NO WAI

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Originally Posted by Virgin Mary

Because it'll always be 0.1 off of 2.

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1.99 is not 0.1 off of 2

There is no number that can show the difference between 2 and 1.999...