满足MUN={1,2,3}.M交N={1}的集合M,N共有几组?
问题描述：
满足MUN={1,2,3}.M交N={1}的集合M,N共有几组?
答
M∪N={1,2,3}M∩N={1}M={1},N={1,2,3}M={1,2},N={1,3}M={1,2},N={1,2,3}M={1,3},N={1,2}M={1,3},N={1,2,3}M={1,2,3},N={1}M={1,2,3},N={1,2}M={1,2,3},N={1,3}M={1,2,3},N={1,2,3}共8组如果不懂,请Hi我,祝学习愉快!...