How to prove 0.999… = 1.

4 points by ssahnaz 14y ago ↗ HN

The meaning of 0.999… is a tricky concept, and depends on what we allow a number to be. For non-math persons, you will probably disagree with the equality, but there are many elementary proofs that could show it. http://mathema-tricks.blogspot.com/

4 comments

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[dead] mquaes 14y ago ↗

http://mathema-tricks.blogspot.com/

jeffcoat 14y ago ↗

That borders on impressive: Four of the five statements leading into the "proofs" are wrong (and the fifth needs a lot of charity), and all three of the proofs are meaningless in exactly the same way.

dcpdx 14y ago ↗

The one I remember is .333 (repeating) = 1/3. .333(3)=.999. 1/3(3)=1. Therefore, .999=1.

mrebus 14y ago ↗

I use tell me a number between .999... And 1