0.999.../The limit of a sequence
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In calculus, sequences such as a1=1/1, a2=1/2, a3=1/3..... are discussed. However, most mathematicians and the majority of the mathematical laity prefer the notation an=1/n (nā„1) for the sequence above. Often, the limit of a sequence is discussed. A sequence a is said to converge to a limit L if a becomes arbitrarily close to L and stays there. For the case of 0.9999..., the sequence would be an=1-10-n, where n is the number of 9's after the decimal point. For infinitely continuing digits, as nāā, an=1-10-ā, thus proving that 0.999999999... until infinity tends to 1.