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Homework Help: Boolean logic deMorgans theorem

  1. Apr 7, 2013 #1
    Hello, I am trying to prove that the following two expressions are the inverse of each other by using deMorgan's theorem.

    i) X = A(B+C)
    ii) X = A' + B'C'

    I am having trouble doing this. Can this actually be achieved with these two expressions ?

    Thank you for any help.
  2. jcsd
  3. Apr 8, 2013 #2


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    Staff: Mentor

    It is confusing the way you have written this, fran1942.

    I think you'll find the question should be something like:

    If X = A(B+C), apply de Morgans's theorem to show that X' = A' + B'C'
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