已知全集U={1,2,3,4,5,6,7,8,9,10,11,13}，集合A={2,4,6,8}，B={3,4,5,6,8,9,11}，求：（1）A∪B（2）CUA（3）CU（A∩B）
（4）A∪(CUB)
网友回答
（1）A∪B ={2,3,4,5,6,8,9,11}（2）CUA={1,3,5,7,9,10,11,13} （3）A∩B ={4,6,8} ，CU（A∩B）={1,2,3,5,7,9,10,11,13}（4）CUB ={1,2,7,10,13}，A∪(CUB)={1,2,4,6,7,8,10,13}解析本小题根据交集、并集、补集的定义求解即可.
（1）A∪B ={2,3,4,5,6,8,9,11（2）CUA={1,3,5,7,9,10,11,13} （3）A∩B ={4,6,8} ，CU（A∩B）={1,2,3,5,7,9,10,11,13}（4）CUB ={1,2,7,10,13}，A∪(CUB)={1,2,4,6,7,8,10,13}