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Thread: topic on logarithm

  1. #1
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    topic on logarithm

    Hi members,
    How can I prove

    Log(b/a) = - log(a/b)

    Thank You
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  2. #2
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    Re: topic on logarithm

    Quote Originally Posted by Gilbert View Post
    How can I prove
    Log(b/a) = - log(a/b)
    $\displaystyle \begin{array}{l} \log \left( {\frac{b}{a}} \right) = \log (b) - \log (a)\\ - \log \left( {\frac{a}{b}} \right) = - \left[ {\log (a) - \log (b)} \right] \end{array}$
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