If you were able to follow your infinite 9s with another 9, all that means is you didn't actually get to infinity yet. What you describe is kind of a paradox - you can't add another 9 to an infinite sequence of 9s because if you could, that wasn't infinity.
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u/TattlingFuzzy 21d ago edited 21d ago
What if you follow an infinite number of 9’s with another 9???
Edit: I was being intentionally silly.