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} 查看更多

 

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