Boolean Algebra Help

Discussion in 'Homework Help' started by cat, Sep 25, 2006.

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  1. cat

    Thread Starter New Member

    Sep 25, 2006
    8
    0
    Hi guys,

    I have a question that i can't find the answer to:

    There's a given function: F=x+yz
    Then i have to show that F+F'=1
    I found that F'=x'y'+x'z'

    therefore:

    F+F'=x+yz+x'y'+x'z'
    =yz+(xx')(xz')+x'y'
    =yz+x'y'

    i don't know how to go from here
    Have i done something wrong.
    Please Help.......
    thanks in advance
    cat
     
  2. oldbird

    New Member

    Sep 24, 2006
    3
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    F+F'=x+yz+x'y'+x'z'
    =x+yz+x'(y'+z')
    =x+yz+x'(yz)'
    =(x'(yz)')'+x'(yz)'
    =1
     
  3. Søren

    Senior Member

    Sep 2, 2006
    472
    28
    Hi,

    Oh Gee, aren't school teachers dull, dumb and delusional :mad:

    Whatever the (Boolean) function is, F + /F will allways yeild "1" as it's an OR of something and its opposite - That's basic Boolean !
     
  4. cat

    Thread Starter New Member

    Sep 25, 2006
    8
    0
    thanks sooooo much oldbird

    hay soren, what you are saying is right but you know, poor students like us have to do the homeowrk that they give. otherwise we are screwed
    thanks for the comment anyways
    cat
     
  5. mik3ca

    Active Member

    Feb 11, 2007
    189
    0
    LMAO

    Have the teacher refer to the "OR" gate truth table, because in an OR gate, an input, along with the same input inverted equals 1.
     
  6. Papabravo

    Expert

    Feb 24, 2006
    9,905
    1,723
    Except that you missed the point of the exercise. If you're too ignorant to figure it out, then I'm cetainly not going to enlighten you.
     
  7. Papabravo

    Expert

    Feb 24, 2006
    9,905
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    Two clowns in one day missed the point of the exercise. What's a poor student to do when faced with such boorishness.
     
  8. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    143
    This is an old thread, please do not resurrect an old thread unless you are going to contribute something to the answer that may be of benefit to others.

    Do not refer to other members as "clowns" - you are free to make a point but please do it with some propriety.

    This topic will now be closed and only reopened at the OPs request.

    Dave
     
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