已知函数,则=________________.
(log23+log49+log827+…+3n)×log9=________________.
=_________________.
函数y=x,x∈(0,8)的值域是_________________.
函数y=loga(x-2)+1(a>0且a≠1)恒过定点______________.
loga<1,则a的取值范围是____________.