Recall that, for all b positive, the domain of:
[tex]f(x)=\log_b(x)[/tex]
is all real numbers greater than 0.
Therefore, the domain of f(x) is:
[tex]0Subtracting 9 from the above inequality we get:[tex]\begin{gathered} 0-9The above inequality in interval notation is:[tex](-9,\infty).[/tex]
Answer: First option.
