Question

不等式x+1/x≤3的解集,

Answer 1

(x＋1)/(x)≤3
(x＋1)/(x)－3≤0
[(x＋1)－3x]/(x)≤0
(1－2x)/(x)≤0
(2x－1)/(x)≥0
x≥1/2或x<0
这个不等式的解集是：{x|x≥1/2或x<0}