Question

已知全集U=A并B={x属于N、0小于等于x小于等于10},A交(CaB)={1,3,5,7,},求集合B

Answer 1

U=｛0,1,2,3,4,5,6,7,8,9,10｝,

A交(CuB )={1,3,5,7,},即1,3,5,7都是A中有,而B中没有的元素.

所以B取U中剩下的元素,即

B=｛0,2,4,6,8,9,10｝