满足|mn|+|m-n|-1=0的整数对(m,n)的个数为多少?
问题描述:
满足|mn|+|m-n|-1=0的整数对(m,n)的个数为多少?
答
|mn|=1-|m-n|>=0
|m-n|
满足|mn|+|m-n|-1=0的整数对(m,n)的个数为多少?
|mn|=1-|m-n|>=0
|m-n|