# Chapter 4 - Summary, Review, and Test - Test - Page 513: 9

$\ln\frac{7}{x^3}$

#### Work Step by Step

Use the following logarithmic formulas to expand the logarithm: $\ln A - \ln B = \ln(\frac{A}{B})$ $\ln x^{n}=n\times\ln x$ $\ln7-3\ln x$ $\ln7-\ln x^3$ $\ln\frac{7}{x^3}$

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