Question

Which answer represents the domain of the logarithmic function given below?

F(x) = log9 x

Answer 1

\(\large\color{slate}{\displaystyle {\rm F}(x)= {\rm Log}_9(x)}\)

Answer 2

you can take a log of any positive number
but \(\large\color{slate}{\displaystyle {\rm Log}_9(0)}\), or \(\large\color{slate}{\displaystyle {\rm Log}_9({\rm negative~~ number})}\)
is undefined.

Answer 3

the x in the log must be positive