Question

Which of the following equations uses the properties of logarithms correctly?

Answer 1

Fisrt: Incorrect, this porperty doesn't exist

Second: also incorrect

Third: The correct is 6ln2

The last one is correct, because:

$\begin{gathered} \ln (\frac{9}{e})=\ln 9-\ln e \\ \ln 3^2-1= \\ 2\ln 3-1 \end{gathered}$