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Math Help - Logic problems?

  1. #1
    keg
    keg is offline
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    Question Logic problems?

    Here is an example of a logic problem my teacher gave in class. I missed the days we learned it, i have a test tomorrow, and i'm so lost.

    ~(~PV~Q) --> ((PΛQ) --> ~P)

    From there we filled some charts with Trues and Falses, but i'm lost and no idea where she's getting these Ts and Fs. Help
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  2. #2
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    Thumbs up

    Your asking about Truth tables, just used to prove things in logic.

    Basicly if we have a statement P, it is either True (T) or False (F)

    so say P is x=5, then either x=5 (T), or x is not 5 (F)

    We can summarise this in a table
    P
    T
    F

    If we add another statement Q, there are now 4 possibilites, both true, P true Q false, vice versa, or both false:
    P Q
    T T
    T F
    F T
    F F

    Wikipedia 'Truth tables' for more examples, and usage of the AND, OR, NOT statements.

    Hope this helps!
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