(1)设全集U={1,2,3,4,5},集合A=(1,a-2,5)Cua={2,4},则a值是?(2)设全集M={m∈Z-3
问题描述:
(1)设全集U={1,2,3,4,5},集合A=(1,a-2,5)Cua={2,4},则a值是?
(2)设全集M={m∈Z-3
答
5
答
a=5
答
(1)a-2=3,所以a=5
(2)M={-2,-1,0,1},N={-1,0,1,2,3}
所以M∩N={-1,0,1}