设M=(y/y=x-12分之12,x属于Z,y属于N),N=(x/y=x-2分之12,x属于Z,y属于N),试分别求M交N和M并N

问题描述:

设M=(y/y=x-12分之12,x属于Z,y属于N),N=(x/y=x-2分之12,x属于Z,y属于N),试分别求M交N和M并N

Though the question is easy. But answering process is complex.

有已知可得:M中的数必须被12整除,所以
M={1,2,3,4,6,12}
而N-2也显然必须被12整除,则
N-2={1,2,3,4,6,12}
所以N={3,4,5,6,8,14}所以
M交N={3,4,6}
M并N={1,2,3,4,5,6,8,12,14}