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0.9999.... is equal to 1

Name: Krieger 2008-08-29 2:44

I honestly thought that by this time, everyone in the world knew this was true, save those who have absolutely no idea what numbers are.....ok, I'll do my best to explain this to all you would-be trolls.

1/3 = 0.333
now multiply both sides by 3 and you get:
3/3 = 0.9999....
OR
1 = 0.9999....

Now, Let's start with 1 = 0.99999.... this time.
Subtract 0.9999.... from each side and you get:
0 = 0.00000....
Yes, there is a 1 there, but it is exactly aleph null zeros from the decimal.....meaning it kinda isn't there, and that you just subtracted the same number from two numbers and got the same answer for both....thus they must be equal.

Last: between any two unequal real numbers, there are infinitely many numbers. I'd like to challenge anyone to find a number between 0.9999..... and 1. If you can find that number, then you win infinitely many internets, but if not, just admit that 0.999... does, in fact, equal 1.

Name: Anonymous 2008-09-06 23:17

>>24
It's relevant because base 10 is incapable of expressing 1/3 as a decimal, where base 3 is.  So the irregularity is an aberration caused by the symbol system used.  The number that the symbol represents is the same in either system.

The base-3 fractions have nothing to do with the base 10 numbers per se, but it illustrates that by using different bases, the problem doesn't exist.  Therefore the problem is with a specific base, i.e. base 10 and not more fundamental mathematical theories.

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