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Math Help - Logarithm Question

  1. #1
    Numbnut247
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    Logarithm Question

    hey guys i need help on a question:
    If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

    Thanks
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  2. #2
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    Quote Originally Posted by Numbnut247
    hey guys i need help on a question:
    If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

    Thanks
    You probably mean that \log 2=m?
    Then
    \log (35/10)=\log (7/2)=\log 7-\log 2=n-m.
    Q.E.D.
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  3. #3
    Junior Member
    Joined
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    an other solution

    Quote Originally Posted by Numbnut247
    hey guys i need help on a question:
    If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

    Thanks
    if you had the algebric equation log((a*b)/c)=log(a)+log(b)-log(c)
    and if log (10)=1
    Then the awnser to your question would be m+ n-1
    But i always mix up whith all those formula
    check it whith a calculus machine if youve got one!

    by!
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