若分式2x+1/x^2-4x+3为非负数,求x的取值范围.
问题描述:
若分式2x+1/x^2-4x+3为非负数,求x的取值范围.
答
(2x+1)/(x^2-4x+3)>=0
(2x+1)/(x-3)(x-1)>=0
(2x+1)(x-3)(x-1)>=0且(x-3)(x-1)≠0
{x|-1/2