设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,7,8,10﹜,求A∩B,A∪B

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设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,7,8,10﹜,求A∩B,A∪B设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,

设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,7,8,10﹜,求A∩B,A∪B
设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,7,8,10﹜,求A∩B,A∪B

设全集U=﹛x|x∈N*且x≤10﹜,其子集A=﹛1,2,4,5,9﹜B=﹛4,6,7,8,10﹜,求A∩B,A∪B
刚上高一是不,看看:
U={1,2,3,4,5,6,7,8,9,10},
A∩B={4};A交B找共同的部分.
A∪B={1,2,4,5,6,7,8,9,10},A 并B找两个的合集,切忌把两个都没有的3写上,还有最大不能大过全集.

A∩B={4}
A∪B={1 2 5 6 7 8 9 10}

U=﹛1,2,3,4,5,6,7,8,9,10﹜ A∩B={4},A∪B=﹛1,2,4,5,6,7,8,9,10﹜ 你可以画张韦恩图解题