[问答题]
1. Write down the domain anb9lk)ya-6yy s p-:c1a,ijkq ad9bj(: ba feh4gu xe1k* range of the 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 .
