(2x-1)/(x-3)≥0
2+5/(x-3)≥0
5/(x-3)≥-2
x-3＞0或x-3≤-5/2
x＞3或x≤1/2(2x-1)/(x-3)≥0怎么变成2+5/(x-3)≥0的？(2x-1)/(x-3)=[2(x-3)+5]/(x-3)=2+5/(x-3)≥0 其实(2x-1)/(x-3)≥0等价于(2x-1)(x-3)≥0且(x-3)≠0