[问答题]
1. Write down the domain and range of4gckg t,j /4fw the logarithmice34aqwn b 0lg2 function $y=\log _{a}$ x where a>0 and a $\neq 1$ .
2. Given that $\log _{x^{2}} y=9 \log _{y}\left(x^{2}\right)$ , find all the possible expressions of y as a function of x .
