I am in 9th grade and taking geometry. Several of my friends taking pre-calc say that 0.9999... does not equal 1, but is just an asymptote. I have not taken that subject yet and they don't give any proofs for why it is an asymptote. I couldn't find any definate answers on the internet that dealt with asymptotes. It would be much appreciated if someone could explain this to me.
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analysis - Injection, making bijection
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