发布时间:2021-02-19 14:22:33
A.{x|x>1} B.{x|x≥1}
C.{x|x>1或x=0} D.{x|x≥1或x=0}
D
解:当x=0时成立;当x≠0时,得x-1≥0,即x≥1.∴x≥1或x=0.