(x+5)/(x-1)2>=2求解集A和y=-4x2+4x+3(x

问题描述:

(x+5)/(x-1)2>=2求解集A和y=-4x2+4x+3(x

(x+5)/(x-1)²≥2【x≠1】,x+5≥2(x²-2x+1),2x²-5x-3≤0,得:-1/2≤x≤3,得解集是{x|-1/2≤x