1 已知全集u{1,2,3,4,5,6},集合m={1,3,5},n={2,4,6},则CuM∩N=N,为什么?2 设集合a={1,2},则满足条件a∪b={1,2,3}的集合b的个数是___,3 设集合a={0,2,4,6},b={-1,0,2},CuA={-3,-1,1,3},则CuB={-3,1,3,4,6},CuB是怎么得出来的?
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![1 已知全集u{1,2,3,4,5,6},集合m={1,3,5},n={2,4,6},则CuM∩N=N,为什么?2 设集合a={1,2},则满足条件a∪b={1,2,3}的集合b的个数是___,3 设集合a={0,2,4,6},b={-1,0,2},CuA={-3,-1,1,3},则CuB={-3,1,3,4,6},CuB是怎么得出来的?](/uploads/image/z/3879627-51-7.jpg?t=1+%E5%B7%B2%E7%9F%A5%E5%85%A8%E9%9B%86u%7B1%2C2%2C3%2C4%2C5%2C6%7D%2C%E9%9B%86%E5%90%88m%3D%7B1%2C3%2C5%7D%2Cn%3D%7B2%2C4%2C6%7D%2C%E5%88%99CuM%E2%88%A9N%3DN%2C%E4%B8%BA%E4%BB%80%E4%B9%88%3F2+%E8%AE%BE%E9%9B%86%E5%90%88a%3D%7B1%2C2%7D%2C%E5%88%99%E6%BB%A1%E8%B6%B3%E6%9D%A1%E4%BB%B6a%E2%88%AAb%3D%7B1%2C2%2C3%7D%E7%9A%84%E9%9B%86%E5%90%88b%E7%9A%84%E4%B8%AA%E6%95%B0%E6%98%AF___%2C3+%E8%AE%BE%E9%9B%86%E5%90%88a%3D%7B0%2C2%2C4%2C6%7D%2Cb%3D%7B-1%2C0%2C2%7D%2CCuA%3D%7B-3%2C-1%2C1%2C3%7D%2C%E5%88%99CuB%3D%7B-3%2C1%2C3%2C4%2C6%7D%2CCuB%E6%98%AF%E6%80%8E%E4%B9%88%E5%BE%97%E5%87%BA%E6%9D%A5%E7%9A%84%3F)
1 已知全集u{1,2,3,4,5,6},集合m={1,3,5},n={2,4,6},则CuM∩N=N,为什么?2 设集合a={1,2},则满足条件a∪b={1,2,3}的集合b的个数是___,3 设集合a={0,2,4,6},b={-1,0,2},CuA={-3,-1,1,3},则CuB={-3,1,3,4,6},CuB是怎么得出来的?
1 已知全集u{1,2,3,4,5,6},集合m={1,3,5},n={2,4,6},则CuM∩N=N,为什么?
2 设集合a={1,2},则满足条件a∪b={1,2,3}的集合b的个数是___,
3 设集合a={0,2,4,6},b={-1,0,2},CuA={-3,-1,1,3},则CuB={-3,1,3,4,6},CuB是怎么得出来的?
1 已知全集u{1,2,3,4,5,6},集合m={1,3,5},n={2,4,6},则CuM∩N=N,为什么?2 设集合a={1,2},则满足条件a∪b={1,2,3}的集合b的个数是___,3 设集合a={0,2,4,6},b={-1,0,2},CuA={-3,-1,1,3},则CuB={-3,1,3,4,6},CuB是怎么得出来的?
1.CuM的意思就是,在集合u中,除去M以外的元素的集合,{1,2,3,4,5,6}中,除去{1,3,5},就是{2,4,6}啦,{2,4,6}交{2,4,6},当然还是{2,4,6},所以CuM∩N=N.
2.a={1,2},a∪b={1,2,3},b集合可能是{1,2,3},{1,3},{2,3},{3},所以个数为4个.
3.a={0,2,4,6},CuA={-3,-1,1,3},集合u={-3,-1,0,1, 2,3, 4,6},CuB是u中除去-1,0,2三个元素,剩下的当然就是-3,1,3,4,6.