已知2/3x3m−1y3与−1/4x5y2n+1是同类项,求5m+3n的值.
问题描述:
已知
x3m−1y3与−2 3
x5y2n+1是同类项,求5m+3n的值. 1 4
答
∵
x3m−1y3与−2 3
x5y2n+1是同类项,1 4
∴3m-1=5,m=2,2n+1=3,n=1,
∴5m+3n═5×2+3×1=10+3=13.