题目内容
而UB={-1,0,2},故B={-3,1,3,4,6}.
填空
(1)若S={2,3,4},A={4,3},则SA=________;
(2)若S={三角形},B={锐角三角形},则SB=________;
(3)若S={1,2,4,8},A=,则SA=________;
(4)若U={1,3,a2+2a+1},A={1,3},UA={5},则a=________;
(5)已知A={0,2,4},UA={-1,1},UB=(-1,0,2),则B=________.
已知A={0,2,4},UA={-1,1},UB={-1,0,2},求B=_______
已知A={0,2,4,6},UA={-1,-3,1,3},UB={-1,0,2},用列举法写出B.