设集合U={1,2,3,4},M={1,2,3},N={2,3,4},则∁U(M∩N)( )
A.{1,2}
B.{2,3}
C.{2,4}
D.{1,4}
∵M={1,2,3},N={2,3,4},∴M∩N={2,3},则∁U(M∩N)={1,4},
故选 D.
设集合U={1,2,3,4},M={1,2,3},N={2,3,4},则∁U(M∩N)( )
A.{1,2}
B.{2,3}
C.{2,4}
D.{1,4}
∵M={1,2,3},N={2,3,4},∴M∩N={2,3},则∁U(M∩N)={1,4},
故选 D.