Comment on Panik

kicksystem@lemmy.world ⁨8⁩ ⁨months⁩ ago

• KeisukeTakatou@lemmy.world ⁨8⁩ ⁨months⁩ ago

  Lmao how about …99999 = -1?

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  • ledtasso@lemmy.world ⁨8⁩ ⁨months⁩ ago

    This one has always bothered me a bit because …999999 is the same as infinity, so it’s like you’re just doing math using infinity as a real quantity which we all know is invalid.

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    • yetAnotherUser@feddit.de ⁨8⁩ ⁨months⁩ ago

      Yes, you’re right this doesn’t work for real numbers.

      It does however work for 10-adic numbers which are not real numbers. They’re part of a different number system where this is allowed.

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    • Snazz@lemmy.world ⁨8⁩ ⁨months⁩ ago

      You can also prove it a different way if you allow the use of the formula for finding the limit if a geometric series on a non-convergent series.

      Sum(ar^n, n=0, inf) = a/(1-r)

      So …999999 = 9 + 90 + 900 + 9000… = 9x10^0 + 9x10^1 + 9x10^2 + 9x10^3… = Sum(9x10^n, n=0, inf) = 9/(1-10) = -1

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      • Kruemel@feddit.de ⁨8⁩ ⁨months⁩ ago

        But why would you allow it?

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