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Math Help - Boolean Laws, and Theorem

  1. #1
    Junior Member Jarod_C's Avatar
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    Boolean Laws, and Theorem

    What's up wonder community of math wizards. I was hoping you could check a problem for me. For every step I need to pick which numbered law from the list was used. HERE IS THE LIST.

    Given = \overline{(A\overline{BC}+\overline{AC})(\overline  {A+B)}}

    19 === \overline{A\overline{BC}+\overline{AC}}+\overline{  \overline{A}+\overline{B}}

    20 === \overline{A\overline{BC}+\overline{AC}}+\overline{  \overline{AB}}

    9 ==== \overline{A\overline{BC}+\overline{AC}}+AB

    20 === \overline{(A\overline{BC}})\overline{(\overline{AC  )}}+AB

    9 ==== \overline{(A\overline{BC}})(AC)+AB

    19 === (\overline {A}+\overline{\overline{BC}})(AC)+AB

    9 ==== (\overline{A}+BC)(AC)+AB

    15 === \overline {A}AC+ABCC+AB

    7 ==== 0\bullet C+ABCC+AB

    3 ==== 0+ABCC+AB

    1 ==== ABCC+AB

    5 ==== ABC+AB

    18 === AB

    I think I might of got it right. #15 I'm not feeling good about.
    Last edited by Jarod_C; December 5th 2013 at 03:30 PM.
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  2. #2
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    Re: Boolean Laws, and Theorem

    Quote Originally Posted by Jarod_C View Post
    What's up wonder community of math wizards. I was hoping you could check a problem for me. For every step I need to pick which numbered law from the list was used. HERE IS THE LIST.

    Given = \overline{(A\overline{BC}+\overline{AC})(\overline  {A+B)}}

    <snip>
    9 ==== (\overline{A}+BC)(AC)+AB

    15 === \overline {A}AC+ABCC+AB
    this should be \overline {A}AC+BCAC+AB, yes they are the same but you have to use one of your laws to get there.

    \overline {A}AC+BCAC+AB --> \overline {A}AC+BACC+AB --> \overline {A}AC+ABCC+AB both by 10

    7 ==== 0\bullet C+ABCC+AB

    3 ==== 0+ABCC+AB

    1 ==== ABCC+AB

    5 ==== ABC+AB

    18 === AB
    you sort of skipped a couple steps here.

    I'd say ABC+AB --> AB(C+1) by 14, --> AB1 by 2, --> AB by 4
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  3. #3
    Junior Member Jarod_C's Avatar
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    Re: Boolean Laws, and Theorem

    That's how it was on my paper, and I had to list the steps. I didn't really even notice that, it's good you said something. For a school paper you'd figure they would put it together better, now I can see why some of it was hard to make sense of. I'm going to use what you pointed out for food for thought. Thanks.
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  4. #4
    Junior Member Jarod_C's Avatar
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    Re: Boolean Laws, and Theorem

    I've been looking at it now for a little bit, and I'm really glad you brought the missing steps up. It's going to help me in class. In digital it always made sense to me when looking at the gates, but when I get to math, and I don't get to see it first hand it's a little hard to put together. Like the missing step in ABC+AB=AB In the circuit you can see it, but on just paper it needs to be explained like you showed. Just had to say thanks again.
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  5. #5
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    Re: Boolean Laws, and Theorem

    you're most welcome.
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  6. #6
    Newbie Burlhaar's Avatar
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    Re: Boolean Laws, and Theorem

    I really liked this concept and also the logic that was used to solve this problem. Nice..!!
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