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    Math Fallacy Proofs

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    • RZ923R
      RZ923 M0★ M2★ M3★ M4★ M5
      last edited by RZ923

      There are many fallacy proofs in maths so you can share some for fun!
      You can also write why the fallacy proof is a fallacy proof.

      Very Interesting

      1 Reply Last reply Reply Quote 2
      • RZ923R
        RZ923 M0★ M2★ M3★ M4★ M5
        last edited by

        \(a = b\)
        \(a^2 = ab\)
        \(a^2 - b^2 = ab-b^2\)
        \((a-b)(a+b) = b(a-b)\)
        \(a+b = b\)
        \(b+b = b\)
        \(2b = b\)
        \(2 = 1\)

        The whole fallacy proof went wrong (or became right, depending on which angle you look at it) when you divide by \(a-b\), which is \(0\)!

        Very Interesting

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        • T
          tidyboar M2 M3★ M5 M6
          last edited by

          $$0=(1-1)+(1-1)+(1-1)+(1-1)\cdots$$ $$0=1-1+1-1+1-1+1-1+\cdots$$ $$0=1+(-1+1)+(-1+1)+(-1+1)+\cdots$$ $$0=1+0+0+0+\cdots$$ $$0=1$$ 😮

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