设集合A={1,3,7,9},B={2,5-a,7,8},A∩B={3,7}则a=
设集合A{1,2,3,4},B{3,4,5},则A∩B= ,A∪B=
填空 设集合A={1,2},集合B={2,3,5},则A ∩B=
设全集U={1,2,3,4,5,6,7,8},集合A={2,4,6},集合B={3,4,5},求A∩B,A∪B,A在U中
设集合A{1,2,a^3-3a^2-a+7},集合B={-2,a+1,a^2-2a+5,a^3+3a^2-4}
设集合A={5,log2(a+3)},B={a,b}.若A∩B={1},则A∪B=______.
设集合A={5,log2(a2-3a+6)},集合B={1,a,b},若A∩B={2},则集合A∪B的真子集的个数是(
设集合A={1,2,3,4},集合B={-2,2}则A∩B=
设集合A={|a+1|,3,5},集合B={2a+1,a平方+2a a平方+2a-1},若A∩B={2,3},求A∪B
设集合A={|a+1|,3,5},集合B={2a+1,a平方+2a,a平方+2a-1},若A∩B={2,3},求A∪B
设集合A={4,5,6,7,9} B={3,4,7,8,9},全集U等于集合A并B,则集合Cu(A交B)中的元素共有几个
设集合A={4,5,7,9},B={3,4,7,8,9},全集U=A∪B,则集合∁U(A∩B)的真子集共有( )
设集合A={x|2≤x<4},B={x|3x-7≥8-2x},求A∪B,A∩B.