已知集合M=(-3,5],N=[-5,5),若全集U=[-5,a],且(CuM)∩(CuN)=(5,a],求a%
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已知集合M=(-3,5],N=[-5,5),若全集U=[-5,a],且(CuM)∩(CuN)=(5,a],求a%
![已知集合M=(-3,5],N=[-5,5),若全集U=[-5,a],且(CuM)∩(CuN)=(5,a],求a%](/uploads/image/z/1707300-36-0.jpg?t=%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88M%3D%EF%BC%88-3%2C5%5D%2CN%3D%5B-5%2C5%29%2C%E8%8B%A5%E5%85%A8%E9%9B%86U%3D%5B-5%2Ca%5D%2C%E4%B8%94%EF%BC%88CuM%29%E2%88%A9%28CuN%29%3D%285%2Ca%5D%2C%E6%B1%82a%25)
CuM=[-5,-3]∪(5,a],CuN=[5,a],(CuM)∩(CuN)=([-5,-3]∪(5,a])∩[5,a]=(5,a],因此a只需满足a>5即可.
已知集合M=(-3,5],N=[-5,5),若全集U=[-5,a],且(CuM)∩(CuN)=(5,a],求a%
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