>>17
0.999... is not representation of 1. it is a short form of converging series(0.9+0.09+0.009...) which has 1 as its Final Product(since its infinite it cannot "reach" it, only get closer and closer, etc).
the 0.999...=1 equality has been doubted for at least since 1770(cheers for Euler).
When it behaves the same as 1 is
only when you take sufficient 9's in the series 0.999... to compensate for inaccuracy. for counter-proof see
http://frozenvoid.blogspot.com/2009/01/0999-not-equal-1.html
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