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Equality of A & B

  1. Mar 2, 2012 #1
    If A U B = A and A n B = A
    can we say A = B ?

    1: A U B = A => B C A => B n A = B
    2: A n B = A => A C B => A U B = B

    1,2 => A=B
     
  2. jcsd
  3. Mar 2, 2012 #2
    Yes, that is correct.
     
  4. Mar 2, 2012 #3
    Thanks Micromass
     
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