已知全集U={l,2,3,4,5,6,7},A={2,4,5),则∁UA=()A.{1,3,5,6,7}B.{1,3,4,6,7}C.(1,4,5,6,7}D.{1,3,6,7}-数学

题目简介

已知全集U={l,2,3,4,5,6,7},A={2,4,5),则∁UA=()A.{1,3,5,6,7}B.{1,3,4,6,7}C.(1,4,5,6,7}D.{1,3,6,7}-数学

题目详情

已知全集U={l,2,3,4,5,6,7},A={2,4,5),则∁UA=(  )
A.{1,3,5,6,7}B.{1,3,4,6,7}C.(1,4,5,6,7}D.{1,3,6,7}
题型:单选题难度:中档来源:乐山一模

答案

根据补集的定义,∁UA是由所有属于集合U但不属于A的元素构成的集合,由已知,有且仅有l,3,6,7,符合元素的条件.
∁UA={l,3,6,7}
故D.

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