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Math Help - Set question 2

  1. #1
    Junior Member Researcher's Avatar
    Joined
    Sep 2009
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    37

    Set question 2

    Interpret the expresion: \phi ={ x : x \neq x}
    Why is the principle of duality always true?

    Why A \oplus  ( B \oplus  C ) = ( A \oplus  B ) \oplus  C ?
    Last edited by Researcher; September 6th 2009 at 06:00 AM.
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