机器智能设计必读 Why 0.999... is not equal to 1? Written in 2012 The current mathematic theory tells us, 10.9, 10.99, 10.999, ..., but at last it says 1=0.999..., a negation of itself (Proof 0.999... =1: 1/9=0.111..., 1/9x9=1, 0.111...x9=0.999..., so 1=0.999...). So it is totally a ...