若单项式4xmy3与-x2yn-1的和是单项式,则m=_,n=_.
问题描述:
若单项式4xmy3与-x2yn-1的和是单项式,则m=______,n=______.
答
∵单项式4xmy3与-x2yn-1的和是单项式,
∴此两单项式是同类项,由同类项的定义可知:
m=2;
n-1=3,n=4.
答:m=2,n=4.