[问答题]
1. Write down the domain an+)x vzf r6m;kmd range of t wb243 -ybprkbhe logarithmic 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 .
