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0 = 100... money is nothing

Discussion in 'BlackHat Lounge' started by Gogol, Jul 29, 2013.

  1. Gogol

    Gogol Elite Member

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    I originally posted it here
    Code:
    http://www.blackhatworld.com/blackhat-seo/blackhat-lounge/591138-wheres-missing-dollar.html
    but still, I am making a new thread because I think I am hijacking sn0rt's thread which I do not want to do. So guys, this is another riddle for you... can you tell me where I am wrong? :D

    [​IMG]
     
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  2. aspe_heat

    aspe_heat Power Member

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    So it's something like :

    Code:
    x = y. 
    Then x2 = xy. 
    Subtract the same thing from both sides: 
    x2 - y2 = xy - y2. 
    Dividing by (x-y), obtain 
    x + y = y. 
    Since x = y, we see that 
    2 y = y. 
    Thus 2 = 1, since we started with y nonzero. 
    Subtracting 1 from both sides, 
    1 = 0.
     
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  3. Gogol

    Gogol Elite Member

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    Wow I think I am drunk now :O Looks perfectly valid to me lol
     
  4. Goal Line Technology

    Goal Line Technology Senior Member

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    I didn't think that you could have a square root of an imaginary number :)
     
  5. Orbit143

    Orbit143 Senior Member

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    nothing
     
  6. back2form

    back2form Jr. VIP Jr. VIP Premium Member

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    "Absolut 100" If you had this one, then you can prove any number = 100 :)

    [​IMG]
     
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  7. Zuuuu

    Zuuuu Regular Member

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    haha I like your post back2form :))))))))
     
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  8. Gogol

    Gogol Elite Member

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    You are close :D

    but where exactly did I do the mistake?


    Let everyone have a go at it and I will post the answer if no one is able to answer it within tomorrow :)
     
  9. Junkfood00

    Junkfood00 Elite Member

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    Goddamit, how many times are we going to have to say this? You can't divide by zero, x-y=0.
     
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  10. Junkfood00

    Junkfood00 Elite Member

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    Dude, you killed the minus right there which is required to form the imaginary number. -1 to +1.

    You should've square rooted the square before multiplying (-1) by itself.
     
  11. Olivier7t1

    Olivier7t1 Newbie

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    Wrong wrong wrong. Was still fun knowing you spent your time trying to figure it out.
     
  12. JFoulds

    JFoulds Power Member

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    i^2 = (√-1)^2
    (√-1)^2 = (√-1)*(√-1)
    (√-1)*(√-1) != (√(-1)(-1))

    It's been a while since I've done complex mathematics, but pretty sure that's your mistake, I'll leave the mystery in why...
     
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  13. davids355

    davids355 Jr. VIP Jr. VIP Premium Member

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    The problem is, 0 doesn't = 100.
     
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  14. Gogol

    Gogol Elite Member

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    You have the correct answer man. :)

    You can not make whole root when any one of the rooted numbers are imaginary.

    For example
    (√2)*(√2) = (√(2 * 2))

    but,
    (√-1)*(√-1) != (√(-1) (-1))

     
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    Last edited: Jul 30, 2013
  15. umerjutt00

    umerjutt00 Jr. VIP Jr. VIP Premium Member

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    Your first step is wrong. THe square root will be cancelled by the power of 2. So only -1 remains... Stop playing games man....
     
  16. Gogol

    Gogol Elite Member

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    Thanks for the big fonts but the first step is perfectly valid lol. Check JFloud's post, and my last reply before this.
     
  17. Gogol

    Gogol Elite Member

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    I wish it was. In that way, I owed you $100 in paypal :D
     
    Last edited: Jul 30, 2013
  18. jazzc

    jazzc Moderator Staff Member Moderator Jr. VIP

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    As JFoulds said, sqrt(x) * sqrt(y) does not necessarily equals sqrt(x*y) in the complex plane :)

    The reason is hidden deep in the fact that when you deal with the complex plane using 1-dimensional functions (i.e. f(x)), you need to cut the complex plane into special pieces, do your stuff there and glue the results together. This means shit 's got discontinuities - which are to math what Matt Cutts is to seo.

    For a result to be true, it has to be the same, no matter how you cut those pieces.When you want to find the principal of an sqrt and you 've got multiplication in there, the possible ways of cutting and gluing do not yield the same result, so the equality can't generally stand.
     
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  19. umerjutt00

    umerjutt00 Jr. VIP Jr. VIP Premium Member

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    (√-1)^2

    power of square root is 1/2

    = (-1)^1/2 x 2

    = -1

    = i^2

    It all ends up like this......


    (√-1)^2 is not equal to √-1 x √-1.
     
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    Last edited by a moderator: Jul 30, 2013
  20. jazzc

    jazzc Moderator Staff Member Moderator Jr. VIP

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    Of course it does :( Time to go back to school :)