问题
选择题
设集合I={-2,-1,0,1,2},A={1,2},B={-2,-1,1,2},则A∪(CIB)=( )
A.1
B.1,2
C.2
D.0,1,2
答案
∵集合I={-2,-1,0,1,2},B={-2,-1,1,2},∴CIB={0},
A∪(CIB)={1,2}∪{0}={0,1,2},
故选 D.
设集合I={-2,-1,0,1,2},A={1,2},B={-2,-1,1,2},则A∪(CIB)=( )
A.1
B.1,2
C.2
D.0,1,2
∵集合I={-2,-1,0,1,2},B={-2,-1,1,2},∴CIB={0},
A∪(CIB)={1,2}∪{0}={0,1,2},
故选 D.