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Boolean Algebra (negation quickie)

  1. Jun 11, 2013 #1
    is this a valid statement

    [itex]\overline{A\overline{B}} = \overline{A}B[/itex]
     
  2. jcsd
  3. Jun 11, 2013 #2
    Doesn't look valid. Verify using Truth Table.
     
  4. Jun 11, 2013 #3
    I seem to recall a rule something like not(AB) = A' + B' and not(A+B) = A'B'

    Don't remember the name however.
     
  5. Jun 11, 2013 #4

    haruspex

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  6. Jun 11, 2013 #5

    collinsmark

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