问题
选择题
集合A={-1,0},B={0,1},C={1,2},则(A∩B)∪C等于( )
A.∅
B.{1}
C.{0,1,2}
D.{-1,0,1,2}
答案
(A∩B)∪C
=({-1,0}∩{0,1})∪{1,2}
={0}∪{1,2}={0,1,2}
故选C
集合A={-1,0},B={0,1},C={1,2},则(A∩B)∪C等于( )
A.∅
B.{1}
C.{0,1,2}
D.{-1,0,1,2}
(A∩B)∪C
=({-1,0}∩{0,1})∪{1,2}
={0}∪{1,2}={0,1,2}
故选C