摘要：8．设全集U＝A∪B＝{x∈N*|lg x<1}.若A∩(∁UB)＝{m|m＝2n+1.n＝ 0,1,2,3,4}.则集合B＝ . 解析 A∪B＝{x∈N*|lg x<1}＝{1,2,3,4,5,6,7,8,9}.A∩(∁UB)＝{m|m＝2n+1.n＝0,1,2,3,4} ＝{1,3,5,7,9}.∴B＝{2,4,6,8}． 答案 {2,4,6,8}

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