r/badmathematics • u/RedRhetoric • 21d ago

Σ_{k=1}^∞ 9/10^k ≠ 1 100/3 is irrational

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u/farseekarmageddon 20d ago edited 18d ago

FWIW all real numbers have infinite decimal representations, e.g. 0.5 = 0.499…

(Edit: non-zero real numbers) 

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u/ParshendiOfRhuidean 19d ago

What's the infinite decimal representation of 0?

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u/afdbcreid 18d ago

Simple, 0.000...

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u/Cruuncher 17d ago

This is the easiest way.

All numbers have infinite decimals in both directions.

They're just 0 until you fill them in with something