
9
∵U={0,1,2},
U(A∪B)={2},∴A∪B={0,1},
∴若A=,则B为{0,1},A={0},B分别为{1},{0,1}?
A={1},B分别为{0},{0,1}?
A={0,1},
B分别为{0},{1},{0,1},
故共有9组.?

9
∵U={0,1,2},
U(A∪B)={2},∴A∪B={0,1},
∴若A=,则B为{0,1},A={0},B分别为{1},{0,1}?
A={1},B分别为{0},{0,1}?
A={0,1},
B分别为{0},{1},{0,1},
故共有9组.?