## College Algebra 7th Edition

$\ln{r} -\ln{3} - \ln{s}$
RECALL: (1) $\ln{(PQ)} = \ln{P} + \ln{Q}$ (2) $\ln{(\frac{P}{Q})} = \ln{P} - \ln{Q}$ Use rule (2) above to obtain: $=\ln{r} - \ln{3s}$ Use rule (1) above to obtain: $=\ln{r} -(\ln{3} + \ln{s})$ Subtract each term of the binomial to obtain: $=\ln{r} -\ln{3} - \ln{s}$