题目

设U={x|x是不大于8的正整数}，A={2,4,5,8}，B={1,3,5,7}，求，．答案：解：根据题意可知U={1,2,3,4,5,6,7,8},CUA={1,3,6,7},CUB={2,4,6,8},则 A∩(∁UB)={2,4,5,8}∩{2,4,6,8}={2,4,8} ．(∁UA)∩(∁UB)={1,3,6,7}∩{2,4,6,8}={6}

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