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1 + 1 = 0 ?

  1. May 17, 2010 #1
    helo..

    We know that 1+1 = 2.

    but try this out..there is some dummy things goes around here

    Firstly, we denote
    1 + 1 = 1 + [tex]\sqrt{1}[/tex]
    <=> 1 + [tex]\sqrt{(-1)(-1)}[/tex]
    <=> 1 + [tex]\sqrt{-1}[/tex][tex]\sqrt{-1}[/tex]
    <=> 1 + i*i
    <=> 1 + (-1)
    <=> 0 ??

    how come 1+1=0 ?
    and where is the mistake ?

    Is it true 1 = [tex]\sqrt{1}[/tex] ?
     
  2. jcsd
  3. May 17, 2010 #2

    D H

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    Staff Emeritus
    Science Advisor

    See [thread=134627]this thread[/thread], one of many, many, many, many other threads on this topic.
     
  4. May 17, 2010 #3
    EDIT:

    Never mind, I was never good at maths. Didn't read what you put properly :P
     
  5. May 17, 2010 #4
    orait.thanks!
     
  6. May 25, 2010 #5
    mod 2 :(
     
  7. May 25, 2010 #6

    Char. Limit

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    Gold Member

    I was going to say the same...

    1 + 1 = 0 mod 2
     
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