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Post by Kislany on Thu Apr 30, 2009 7:12 pm

proofing that 1 = .9 repeating

1 = 1/3 + 1/3 + 1/3
1/3 = .3 repeating
.3 repeating + .3 repeating + .3 repeating = .9 repeating

therefore .9 repeating = 1
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Post by CivBase on Thu Apr 30, 2009 7:13 pm

This was in the CB once....

But this is false.

.3 repeating is not equal to 1/3, it's just the closest thing we can get.

You can't have .9 repeating, as eventually truncation causes this to end. Infinity is not real, it's a human convention, thus .9 cannot repeat infinitely.

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Post by Kislany on Thu Apr 30, 2009 7:21 pm

what about pie 3.14 and then aninfinite number huh ho do you explain that
and yes 1/3 = .3 repeating
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Post by CivBase on Thu Apr 30, 2009 7:23 pm

Pie isn't a real number, it's a complex number. A less correct term that many teachers prefer to use would be "imaginary number."

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Post by Kislany on Thu Apr 30, 2009 7:32 pm

right but get into advanved physics and calculus and then imaginary numbers become real
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Post by CivBase on Thu Apr 30, 2009 7:45 pm

But the same rules do not apply.

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Post by Toaster on Thu Apr 30, 2009 8:13 pm

1/3 is not .3 repeating. It is .3 repeating after being rounded.
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Post by Kislany on Thu Apr 30, 2009 8:59 pm

no ive got four of my math teachers and a mathmatishen to agree wtih me

now if only i could spell
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Post by CivBase on Thu Apr 30, 2009 9:00 pm

Kislany wrote:no ive got four of my math teachers and a mathmatishen to agree wtih me

now if only i could spell
My math teachers think zero isn't odd or even as well... but that doesn't mean it isn't.

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Post by Kislany on Thu Apr 30, 2009 9:01 pm

its not
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Post by Toaster on Thu Apr 30, 2009 9:47 pm

It's even.

Mathematician.
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Post by KristallNacht on Thu Apr 30, 2009 9:51 pm

0 is even. as it's a whole number multiple of 2.
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Post by KrAzY on Thu Apr 30, 2009 10:04 pm

a multiple of a number is a number that can be multiplied to equal that number



if you multiply 0 by anything you get 0


0 is not a multiple of 2







however 0 is even
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Post by Nocbl2 on Thu Apr 30, 2009 10:41 pm

SO MUCH MATH!! RAWRARARA!!!!! And yes, zero is even
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Post by KristallNacht on Thu Apr 30, 2009 10:44 pm

KrAzY wrote:a multiple of a number is a number that can be multiplied to equal that number



if you multiply 0 by anything you get 0


0 is not a multiple of 2





what? 0 x 2 is 0. Thus 0 is a multiple of 2.
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Post by KrAzY on Thu Apr 30, 2009 10:48 pm

lol your right.... I was thinking factors
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Post by Ukurse on Thu Apr 30, 2009 11:17 pm

Well. If Odd and even number sequence between every 2 numbers than it must go -3,-2,-1,0,1,2,3.
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Post by Rasq'uire'laskar on Thu Apr 30, 2009 11:56 pm

How it works...
amazing Proof How_it_works

By the way, this comic is weird. On XKCD.com, the mouseover text reads "It's pi plus c, duh!"

But... that's not what it is. The integral of x squared is x to the third power divided by three, plus c...
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Post by Rotaretilbo on Fri May 01, 2009 12:19 am

You know, you probably could have made a better case for this, Kislany, if you showed up x/9 = .x repeating, so 1/9 is .1 repeating and 2/9 is .2 repeating and so on, and then said that 9/9 must then be .9 repeating, but is also 1. But, unfortunately (for you, at least), Civ and the others are right, .9 repeating != 1, because .9 repeating is not a rational number and thus cannot equal the rational number of 1.

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Post by Rasq'uire'laskar on Fri May 01, 2009 12:33 am

And for our next trick, we shall prove that 2+2 can equal 3 or 5, depending on what the Party wants it to be.
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Post by PiEdude on Fri May 01, 2009 6:05 am

Kislany wrote:proofing that 1 = .9 repeating

1 = 1/3 + 1/3 + 1/3
1/3 = .3 repeating
.3 repeating + .3 repeating + .3 repeating = .9 repeating

therefore .9 repeating = 1

Yes, but .9 is rounded up to 1.
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Post by CivBase on Fri May 01, 2009 6:36 am

Zero is even, but people confuse even and odd with positive and negative. Zero is neither positive or negative, but it is even, not odd.

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Post by KristallNacht on Fri May 01, 2009 8:47 am

Rasq'uire'laskar wrote:And for our next trick, we shall prove that 2+2 can equal 3 or 5, depending on what the Party wants it to be.

2+2=5 =D





for extremly large values of 2
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Post by CivBase on Fri May 01, 2009 3:36 pm

Well... I talked to my math teacher about this today, as it was the second time I'd seen it, and told him why I didn't think it was true. He didn't sound entirely sure, but he said that he had some math book that had a section that had an algorithm that proved it and he was going to look for it. Should be interesting...

What kills me is that if 1=.9 repeating as shown with three thirds...

1/3 + 1/3 + 1/3 + 1/3 + 1/3 + 1/3 = 6/3 = 2

.3(...) x 6 = 1.9(...)8

So does 2=1.9(...)8?

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Post by Kasrkin Seath on Fri May 01, 2009 5:34 pm

First of all.... zero is not a number, it is a concept for nothing in mathematical terms.

1/3 is most closely equal to .3 repeating infinitely
.3 Repeating Infinitely x 3 is .9 repeating infinitely.

the problem is that 1/3 cannot be turned into decimal form. The system of numbers works on a scale of ten. 3 is not a factor of ten, 100, 1000, etc. so it can never perfectly exist in it.

This entire thread is null.
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