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Boolean algebra problem

  1. Jun 2, 2016 #1
    • members are warned that removing diagrams from homework threads is against PF rules
    https://scontent-mxp1-1.xx.fbcdn.net/v/t35.0-12/13324008_10209600482268675_3779883_o.png?oh=abd4c815b9472f70cfbfbb1923a37b3c&oe=5752F454

    Number 12 : I have simplified it and I have got AB but the model answer in red say A(comp(B)+c)
    I just want is that answer true or not , thanks in advance
     
  2. jcsd
  3. Jun 2, 2016 #2

    mfb

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    2016 Award

    Staff: Mentor

    Why don't you check yourself? What is the output if ##A \overline B## (and choose whatever you like for C)?
     
  4. Jun 2, 2016 #3
    You are right. You can easily see that every input that includes B=0 gives a 0 output, when by the answer in red (A,B,C)=(1,0,0) for example should give 1.
     
  5. Jun 3, 2016 #4

    NascentOxygen

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    Staff: Mentor

    To get the textbook's answer, you need to restore a missing inverter so the upper AND gate receives ##\overline B## at its lower input.
     
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