#### Answer

Please see step-by-step.

#### Work Step by Step

The domain of a logarithmic function of the form $f(x)=\log_{b}x$ is the set of all positive real numbers.
The domain of $f(x)=\log_{b}g(x)$ consists of all $x$ for which $g(x)>0$.
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To find the domain, we must solve the inequality
$g(x) > 0$,
whose solution set will be all numbers x such that f(x) is defined.
In other words, the domain of f.