救救我

问题描述:

救救我
已知函数f(x)=(ax^2+2x-1)/x的定义域恰为不等式:log2(x+3)+log1/2(x)

(1)log2(x+3)+log1/2(x)=log2(x+3)-log2(x)=log2(x+3)/(x)