1.函数y=√{log1/2为底[(x的平方)-1]}的定义域为()
A.[-√2,-1)U(1,√2]
B.(-√2,-1)U(1,√2)
C.[-2,-1)U(1,2]
D.(-2,-1)U(1,2)
2.若函数f(x)=log(a为底)x,(0