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Math Help - GCD

  1. #1
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    GCD

    why do we say that if a,b,c are pairwise coprime then gcd(a,b,c)lcm(a,b,c)=abc

    when do we enforce that they are pairwise coprime instead of gcd(a,b,c)=1?
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  2. #2
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    Re: GCD

    Pairwise coprime means that every pair of two integers is coprime. For example, {12,36,49} and {12,35,47} both have GCD equal to 1, but {12,36,49} is not pairwise coprime.
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