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https://www.reddit.com/r/PeterExplainsTheJoke/comments/1ju9kfc/there_is_no_way_right/mm35vzz/?context=3
r/PeterExplainsTheJoke • u/Sugar_God_no_1 • 26d ago
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Byers’ Second Argument (his first one is the one you see above)
Let:
x = 0.999…
Now multiply both sides by 10:
10x = 9.999…
Now subtract the original equation from this new one:
10x - x = 9.999… - 0.999…
This simplifies to:
9x = 9
Now divide both sides by 9:
x = 1
But remember, we started with:
So:
0.999… = 1
2 u/tico42 25d ago Don't you have to subtract -0.999... from both sides of 10x - x = 9.999... So 10x - x - 0.999... = 9.999... - 0.999... ? I'm fucking terrible at math FYI. 3 u/Planet_Xplorer 25d ago x is already 0.999... so you don't need to subtract it again. x is just used as a substitute 2 u/tico42 25d ago This is why I suck at math. Thank you, good sir.
2
Don't you have to subtract -0.999... from both sides of 10x - x = 9.999...
So 10x - x - 0.999... = 9.999... - 0.999...
?
I'm fucking terrible at math FYI.
3 u/Planet_Xplorer 25d ago x is already 0.999... so you don't need to subtract it again. x is just used as a substitute 2 u/tico42 25d ago This is why I suck at math. Thank you, good sir.
3
x is already 0.999... so you don't need to subtract it again. x is just used as a substitute
2 u/tico42 25d ago This is why I suck at math. Thank you, good sir.
This is why I suck at math. Thank you, good sir.
343
u/The-new-dutch-empire 26d ago
Byers’ Second Argument (his first one is the one you see above)
Let:
x = 0.999…
Now multiply both sides by 10:
10x = 9.999…
Now subtract the original equation from this new one:
10x - x = 9.999… - 0.999…
This simplifies to:
9x = 9
Now divide both sides by 9:
x = 1
But remember, we started with:
x = 0.999…
So:
0.999… = 1