## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$\displaystyle \log_{a}\frac{M}{N}$ is a logarithm of a quotient'' (calculation order: first the quotient, then take out its logarithm) $\displaystyle \frac{\log_{a}M}{\log_{a}N}$ is a quotient of logarithms'' (calculation order: first the two logarithms, then divide to find the quotient)