题目内容
若集合A={0,1,2,3},B={1,2,4},则集合AB= ( )
A.{0,1,2,3,4} B.{1,2,3,4} C.{1,2} D.{0}
A
若集合A={0,1,2,3,4,5,6},f:x→y=x2-4x是从A到B的映射,则集合B中至少有________个元素.
若集合A={0,1},A∪B={0,1,2},则满足条件的集合B的个数是_________
*m若集合A={0,1,2,3},B={1,2,4},则集合AB=
A.{0,1,2,3,4} B.{1,2,3,4} C.{1,2} D.{0}
若集合A={0,1,2,3},B={1,2,4},则集合AB=