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Study = Don't Fail?

  1. Ha ha very amusing!

    8 vote(s)
    57.1%
  2. Hell no so boring!

    6 vote(s)
    42.9%
  1. Sep 14, 2006 #1
    Hi all,

    Just some interesting stuff to share.

    Study = Don't Fail--------(1)
    Don't Study = Fail--------(2)

    Add (1) &(2)

    Study + Don't Study = Don't Fail + Fail

    Factorising the equation,

    Study(1+Don't) = Fail(1+Don't)

    Study = Fail !??!?!?!

    :P

    Delzac
     
  2. jcsd
  3. Sep 14, 2006 #2

    Gokul43201

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    Dividing (1) by (2)
    study/(don't study) = (don't fail)/fail
    Hence 1/(don't) = don't
    Or don't =1 or -1

    If don't = -1
    1+don't = 0
    Division by 0 is illegal.

    If don't =1 (the multiplicative identity), then (1) and (2), both become: study=fail,
    which is not inconsistent with the final result.
     
    Last edited: Sep 14, 2006
  4. Sep 14, 2006 #3
    lol didn't notice thx for the note:blushing:
     
  5. Sep 14, 2006 #4
    hmm.........if Don't = 1 then it takes the fun out of things already, but is can't be -1 also...zzzzz i will try think of a better equation. ^^
     
  6. Sep 14, 2006 #5

    ZapperZ

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    Try this one (which is a rather old "puzzle")

    1 = sqrt(1) = sqrt(-1*-1) = sqrt(-1)*sqrt(-1)=i*i=-1

    so 1 = -1 !!

    [Now before people jump all over me on that, I KNOW where the fault is].

    Zz.
     
  7. Sep 14, 2006 #6

    Mech_Engineer

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    I've got a good one:

    Women = Money * Time

    Time = Money (Time is money!)

    Women = (Money)^2

    Money = sqrt(Evil) (Money is the ROOT of all evil...)

    So, Women = Evil :devil:

    Of course I've known this all along, I just have a mathematical proof of it now :rofl:
     
  8. Sep 14, 2006 #7
    Nice one mech, how very true.

    Anyway referring back to zapper, something must be wrong, but i just can't a hand to it. take this for example.

    1 = sqrt(1) = sqrt( -1*-1) = sqrt( (-1)^2 ) = (-1)^(2/2) = -1 ?!?!

    For now i can't solve, i will get back to you later.
     
  9. Sep 14, 2006 #8

    Gokul43201

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    The answer is simple, and exemplified by shortening the process some:

    -a = sqrt(a^2) = a
     
  10. Sep 14, 2006 #9
    hmm.........here's my initial thought.

    X = sqrt ( (+-x)^2 ) there is something wrong with this step right?
     
  11. Sep 14, 2006 #10

    Gokul43201

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    Yes, it's like saying: 0 = inv. sin (0) = pi

    The square root (like the inverse sine) is not strictly a function, because it is a one-to-many mapping (functions, strictly, are may-to-one, or one-to-oe maps). These are sometimes, loosely called multiple valued functions, with the condition that a principal value is assigned to the image (like the positive square root) when it's not specified which image you are talking about.
     
  12. Sep 14, 2006 #11

    Hahaha! That has to be one of the best replies to a joke I have ever heard.:rofl:
     
  13. Sep 14, 2006 #12
    can i also solve the problem by saying that: 1 = sqrt ( (-1)^2) = l -1 l = 1

    is this explaination valid?
     
  14. Sep 14, 2006 #13

    Mk

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    I think some of you are spending too much time on turning words and phrases into mathematical shenanigans.
     
  15. Sep 15, 2006 #14
    Anyway, When i ask my Math teacher about

    " 1 = sqrt(1) = sqrt(-1*-1) = sqrt(-1)*sqrt(-1)=i*i=-1 ".
    -------------------^^^^^------------------------
    She says that it is not valid because if u have negative numbers in brackets, then u cannot seperate them out, instead u must work them out 1st bacause negative numbers are special. which i feel is crap. But is her explaination correct?
     
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