# Chapter 9 - Section 9.6 - Properties of Logarithms - Exercise Set: 19

$-1log_{4}5=-log_{4}5$ $#### Work Step by Step The power property of logarithms tells us that$log_{b}x^{r}=r log_{b}x$(where x and b are positive real numbers,$b\ne1$, and r is a real number). Therefore,$ log_{4}5^{-1}=-1 \times log_{4}5=-1log_{4}5=-log_{4}5 .

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