2.已知集合 { | $2}, { |1 3}A x x B x x= > =$ < <,则 A B=I
.{ | 2}A x x> .{ | 1 }B x x> .{ | 2 3}C x x< < .{ |1 3}D x x< <
参考答案
C[来源: ]
2014_退役省自主命题 (2014·文)
2.已知集合 { | $2}, { |1 3}A x x B x x= > =$ < <,则 A B=I
.{ | 2}A x x> .{ | 1 }B x x> .{ | 2 3}C x x< < .{ |1 3}D x x< <
C[来源: ]
【答案】C[来源: ]
【解析】由交集的定义可得 / $2 3A B x x= < <I,$故选C.
【考点定位】集合交集