已知y=log(1/2) [a^2x+2(ab)^x-b^2x+1] (a.b∈R+),求使y为负值的x的取值范围已知y=log1/2[a^2x+2(ab)^x-b^2x+1] (a.b∈R+),求使y为负值的x的取值范围.

问题描述:

已知y=log(1/2) [a^2x+2(ab)^x-b^2x+1] (a.b∈R+),求使y为负值的x的取值范围
已知y=log1/2[a^2x+2(ab)^x-b^2x+1] (a.b∈R+),求使y为负值的x的取值范围.