题目内容
【题目】设A={x∈Z||x|≤6},B={1,2,3},C={3,4,5,6},求:
(1)A∩(B∩C);
(2)A∩CA(B∪C).
【答案】(1) A∩(B∩C)={3}(2)A∩CA(B∪C)={-6,-5,-4,-3,-2,-1,0}
【解析】试题分析:
(1)首先求得集合A,然后进行交集运算可得A∩(B∩C)={3};
(2)由题意可得CA(B∪C)={-6,-5,-4,-3,-2,-1,0}.结合交集运算的运算有:A∩CA(B∪C)={-6,-5,-4,-3,-2,-1,0}
试题解析:
∵A={-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6}
(1)又∵B∩C={3},∴A∩(B∩C)={3};
(2)又∵B∪C={1,2,3,4,5,6}
得CA(B∪C)={-6,-5,-4,-3,-2,-1,0}.
∴A∩CA(B∪C)={-6,-5,-4,-3,-2,-1,0}
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