已知全集U={1,2,3,4,5,6,7,8,9,10},集合A={1,3,5,8,9},B={2,5,6,8,10},(1)求A∪B,(CUA)∩(CUB);
题型:解答题难度:一般来源:不详
已知全集U={1,2,3,4,5,6,7,8,9,10},集合A={1,3,5,8,9},B={2,5,6,8,10}, (1)求A∪B,(CUA)∩(CUB); (2)若定义集合的“差”:A-B={x|x∈A,且x∉B},求集合A-B. |
答案
(1)因为全集U={1,2,3,4,5,6,7,8,9,10},集合A={1,3,5,8,9},B={2,5,6,8,10}, 所以A∪B={1,2,3,5,6,8,9,10}, CUA={2,4,6,7,10},CUB={1,3,4,7,9}. (CUA)∩(CUB)={2,4,6,7,10}∩{1,3,4,7,9}={4,7}; (2)集合的“差”:A-B={x|x∈A,且x∉B}, 所以集合A={1,3,5,8,9},B={2,5,6,8,10}, 集合A-B={1,3,9}. |
举一反三
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