问题
单项选择题
已知全集U=1,2,3,4,5,6,7,8,M=1,3,5,7,N=5,6,7,则
=().
A.5,7
B.2,4
C.2,4,8
D.1,3,5,6,7
答案
参考答案:C
解析:
M∪N={1,3,5,6,7},而U={1,2,3,4,5,6,7,8,9},所以M∪N在U中的补集为{2,4,8}.故选C.
已知全集U=1,2,3,4,5,6,7,8,M=1,3,5,7,N=5,6,7,则
=().
A.5,7
B.2,4
C.2,4,8
D.1,3,5,6,7
参考答案:C
解析:
M∪N={1,3,5,6,7},而U={1,2,3,4,5,6,7,8,9},所以M∪N在U中的补集为{2,4,8}.故选C.