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Boolean Algebra Trouble

  1. Sep 29, 2011 #1
    1. The problem statement, all variables and given/known data

    Simplify the following problem using boolean algebra:

    Use algebra or karnaugh maps to simplify the following circuit:

    2. Relevant equations
    Boolean algebra rules and demorgan's law

    3. The attempt at a solution

    1. (p+q'r')(p'q'+r)
    Not sure if correct

    Not sure about this one either
    Last edited: Sep 29, 2011
  2. jcsd
  3. Sep 29, 2011 #2


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    OK to there. Then next equation is wrong. Use the identity a + a'b = a + b.
    What rule did you use to get that step?
  4. Sep 29, 2011 #3
    So i get
    pr+q' for the first one
    and i used demorgan's law to get to the second step in the second question
  5. Sep 29, 2011 #4


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    Actually, after looking at it a bit more leisurely than I did this morning, I think you should have just stopped at pr + q'r'p' which is correct. I don't think my suggestion was good.

    For the second one, use the associative law to group the two center terms first to get started.
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