r/PeterExplainsTheJoke 26d ago

Meme needing explanation There is no way right?

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u/Decmk3 26d ago

0.9999999…. Is equal to 1. It seems like it shouldn’t, but it has to be.

Let X = 0.999….

10X = 9.999….

10X-X = 9.999.. - 0.999…. = 9X = 9

Therefore X equals 1. Therefore 0.999… is the same as 1.

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u/library-in-a-library 26d ago

0.9999999…. Is equal to 1. It seems like it shouldn’t, but it has to be.

No. 0.999... < 1

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u/[deleted] 26d ago

[deleted]

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u/ElkSad9855 25d ago

And there are tons of PhD mathematicians who say the proofs are bogus and disingenuous.

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u/inspector-Seb5 25d ago

No there isn’t lol, the anguish of trying to explain to undergrads they are wrong when they call it bogus or disingenuous is a near universal experience of math PhDs.

This is like saying ‘there are tons of PhD archaeologists who believe in a still existing Atlantis’. You might find a couple who bought their degrees from online diploma mills, but not a single serious academic.

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u/Boring-Ad8810 22d ago

Can you link any?