(x-y)的m次方×(y-x)的2m次方+(y-x)的3m次方等于多少?
问题描述:
(x-y)的m次方×(y-x)的2m次方+(y-x)的3m次方等于多少?
答
(x-y)的m次方×(y-x)的2m次方+(y-x)的3m次方
=(x-y)的(m+2m)-(x-y)的3m次方
=0