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    Anyone know any decent proofs for 1 = 2?

    I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

    Put down any you know anyway!

    Cheers guys!
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    (Original post by Master Gee)
    Anyone know any decent proofs for 1 = 2?

    I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

    Put down any you know anyway!

    Cheers guys!
    suppose x = 1
    then x ² - 1 = x - 1
    factorising gets you (x + 1) (x - 1) = (x - 1)

    Divide both side by (x-1)
    you get (x+1) = 1

    put back x = 1

    and you get 2 = 1

    =)
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    (Original post by Master Gee)
    Anyone know any decent proofs for 1 = 2?

    I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

    Put down any you know anyway!

    Cheers guys!
    1=a
    let a=2
    1=2

    How can you have proof for something that's not true :stupido3:
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    (Original post by Saiyan)
    Divide both side by (x-1)
    bogus! :thumpdown: you *cant* divide by 0
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    (Original post by endeavour)
    1=a
    let a=2
    1=2

    How can you have proof for something that's not true :stupido3:
    With cunning and deception!

    Obviously you can't, but it's a laugh trying. Prooving that 1 = 2 kind of negates the universe because it means all numbers equal each other so everything dies.

    Most of the proofs revolve around 0 and it's lack of definition - division by 0, powers of 0, 0 to a power etc. There's other ones too such as using set theory or cyclical function as I said above.
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    http://mcraefamily.com/MathHelp/JokeProofLog2Zero.htm
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    imagine a series x+x+x+x+x+x+x+x...+x
    differentiated u get 1+1+1+1+...1
    ok, now say you have x 1's
    which is x
    that means you would x x's
    which is x^2
    differentiated you get 2x
    so the answer is x and 2x
    regardless of the value of x
    therefore 1=2
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    pretty damn good, although if you know how it works could you explain how it goes from the third to the fourth line.

    the - 2(1/2 + 1/4 +...) going to -(1 + 1/2 + 1/3 + ...) is what i don't get

    Cheers
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    (Original post by Freeway)
    imagine a series x+x+x+x+x+x+x+x...+x
    differentiated u get 1+1+1+1+...1
    ok, now say you have x 1's
    which is x
    that means you would x x's
    which is x^2
    differentiated you get 2x
    so the answer is x and 2x
    regardless of the value of x
    therefore 1=2
    that one's a good un too, although it only works for positive integers and there's another reason why it's wrong too... I've forgotten it though
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    (Original post by Master Gee)
    pretty damn good, although if you know how it works could you explain how it goes from the third to the fourth line.

    the - 2(1/2 + 1/4 +...) going to -(1 + 1/2 + 1/3 + ...) is what i don't get

    Cheers
    2(1/2 + 1/4 +...) = 2/2 + 2/4 + 2/6 + 2/8 ... = 1 + 1/2 + 1/3 + 1/4 ...
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    (Original post by endeavour)
    1=a
    let a=2
    1=2

    How can you have proof for something that's not true :stupido3:
    lol
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    If you wanted to know, the log 2 one is false because the series is not absolutely convergent, and the series one is because the function is not continuous.
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    (Original post by JamesF)
    2(1/2 + 1/4 +...) = 2/2 + 2/4 + 2/6 + 2/8 ... = 1 + 1/2 + 1/3 + 1/4 ...
    cough... that's embarassing

    cheers
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    (Original post by El Chueco)
    bogus! :thumpdown: you *cant* divide by 0
    -____-" lol... thanks for pointing that out for me =)
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    Hmm i did have a 1=9 written down somewhere but i've lost it. Had loads of trig in it, but wasn't technically quite right! Does anyone know it??
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    http://www.magicmaths.tk

    The one on the left is fairly rubbish, but the one on the right is a little better.
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    a = b
    times both sides by b
    ab = b2
    minus a2
    ab – a2 = b2 – a2
    factorise
    a(b-a) = (b+a)(b-a)
    divide by (b-a)
    a = b+a
    replace b by a
    a = a + a
    a = 2a
    divide by a
    1 = 2
 
 
 
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