Answer
$-3\log_{b} C$
Work Step by Step
Using $\log_b x^a=a\log_b x$ (or the logarithm of a power), the given logarithmic equation, $
\log_{b} C^{-3}
,$ is equivalent to
\begin{array}{l}\require{cancel}
-3\log_{b} C
.\end{array}
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