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Math Help - Derive (AVB)V(BVC)

  1. #1
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    Derive (AVB)V(BVC)

    Derive (AVB)V(BVC)

    1| (AVC)VB ASS


    So far I have:

    1| (AVC)VB ASS
    2|


    Yeah, I can't even get to the next line :/ I suck at these....is the answer just too obvious?
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  2. #2
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    Re: Derive (AVB)V(BVC)

    Use disjunction elimination on 1.
    Thanks from Koohyar
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  3. #3
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    Re: Derive (AVB)V(BVC)

    hey did you ever get the answer, divinelogos
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  4. #4
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    Re: Derive (AVB)V(BVC)

    Is the problem to derive (A ∨ B) ∨ (B ∨ C) from the assumption (A ∨ C) ∨ B? One needs to do disjunction elimination on the assumption, then again disjunction elimination on A ∨ C.
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