https://old.reddit.com/r/confidentlyincorrect/comments/1b0iycz/999repeating_does_in_fact_equal_1/
!math !mathematics nerd slapfights
https://medium.com/@kenahlstrom/proof-that-99999-is-not-equal-to-1-5672e7dd58ce
Another day of Redditors being confused by high school math. Although to be fair, I still think proportionally the number of people who get it here is still higher than the general population.
I had meant for that to sound encouraging, but in hindsight actually that's terrifying.
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ChatGPT gave a pretty easy to understand proof.
x = 0.999…
10x = 9.999…
10x - x = 9.999… - 0.999….
9x = 9
x = 1
The shorter one is
x = 1
divide by 3
x/3 = 1/3 = 0.333…
multiply by 3
x = 0.999…
QED
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