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Mind=Blown
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this post was submitted on 17 Jul 2023
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No, it's not "so close so as to basically be the same number". It is the same number.
They said its the same number though, not basically the same. The idea that as you keep adding 9s to 0.9 you reduce the difference, an infinite amount of 9s yields an infinitely small difference (i.e. no difference) seems sound to me. I think they’re spot on.
No, there is no difference. Infitesimal or otherwise. They are the same number, able to be shown mathematically in a number of ways.
Technically you're both right as there are no infinitesimals in the real number system, which is also one of the easiest ways to explain why this is true.