设集合A=x丨x2-ax+a2-19=0 B=x丨x2-5x+6=0 C=x丨x2+2x-8=0 1若A交B=A并B.求A2若空集真包含于A交B,A交C=空集 ,求a设全集U为12345,A=X丨X2-5X+M=0 B=X丨X2+NX+12=0 且 (CuA)UB=1345,B不是空集,求M+N
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![设集合A=x丨x2-ax+a2-19=0 B=x丨x2-5x+6=0 C=x丨x2+2x-8=0 1若A交B=A并B.求A2若空集真包含于A交B,A交C=空集 ,求a设全集U为12345,A=X丨X2-5X+M=0 B=X丨X2+NX+12=0 且 (CuA)UB=1345,B不是空集,求M+N](/uploads/image/z/2828695-31-5.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88A%3Dx%E4%B8%A8x2-ax%2Ba2-19%3D0+B%3Dx%E4%B8%A8x2-5x%2B6%3D0+C%3Dx%E4%B8%A8x2%2B2x-8%3D0+1%E8%8B%A5A%E4%BA%A4B%3DA%E5%B9%B6B.%E6%B1%82A2%E8%8B%A5%E7%A9%BA%E9%9B%86%E7%9C%9F%E5%8C%85%E5%90%AB%E4%BA%8EA%E4%BA%A4B%2CA%E4%BA%A4C%3D%E7%A9%BA%E9%9B%86+%2C%E6%B1%82a%E8%AE%BE%E5%85%A8%E9%9B%86U%E4%B8%BA12345%2CA%3DX%E4%B8%A8X2-5X%2BM%3D0+B%3DX%E4%B8%A8X2%2BNX%2B12%3D0+%E4%B8%94+%EF%BC%88CuA%EF%BC%89UB%3D1345%2CB%E4%B8%8D%E6%98%AF%E7%A9%BA%E9%9B%86%2C%E6%B1%82M%2BN)
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