How do you evaluate log_9(1)?

I found: ${\log}_{9} \left(1\right) = 0$
You need to find a number $x$ such that:
${9}^{x} = 1$
The value will be $x = 0$ because ${9}^{0} = 1$.
${\log}_{9} \left(1\right) = 0$