若1/2xm+1y2与−1/3yn−1x3是同类项,则m+n=_.
问题描述:
若
xm+1y2与−1 2
yn−1x3是同类项,则m+n=______. 1 3
答
∵
xm+1y2与−1 2
yn−1x3是同类项,1 3
∴
,
m+1=3 n−1=2
解得:
,
m=2 n=3
∴m+n=5.
故答案为:5.