题目内容
命题“若A∪B=A,则A∩B=B”的否命题是( )?
A.若A∪B≠A,则A∩B≠B?
B.若A∩B=B,则A∪B=A?
C.若A∩B≠B,则A∪B≠A?
D.若A∪B≠A,则A∩B=B
命题“若A∩B=A,则AB的逆否命题是( )
A.若A∪B≠A,则AB B.若A∩B≠A,则AB
C.若AB,则A∩B≠A D.若AB,则A∩B≠A
A.若A∪B≠A,则A∩B≠B B.若A∩B=B,则A∪B=A
C.若A∩B≠B,则A∪B≠A D.若A∪B≠A,则A∩B=B