若单项式-5(x^2)(y^1/2m+2)与单项式6(x^2n+1)(y^3)是同类项,则m,n分别为()

问题描述:

若单项式-5(x^2)(y^1/2m+2)与单项式6(x^2n+1)(y^3)是同类项,则m,n分别为()
A:1/2,2 B:2,1/2 C:-1/2,2 D:2,-1/2

单项式-5(x^2)(y^1/2m+2)与单项式6(x^2n+1)(y^3)是同类项
2+1/2m+2=2n+1+3
1/2m=2n
m=4n
选B:2,1/2