若3x^n-1y^2-m和-2x^4+m y^n+1是同类项,则m= n=

若3x^n-1y^2-m和-2x^4+m y^n+1是同类项,则m= n=
若3x^n-1y^2-m和-2x^4+m y^n+1是同类项,则m= n=

若3x^n-1y^2-m和-2x^4+m y^n+1是同类项,则m= n=
4+m=n
2-m=n+1
两式相加得到
6=2n+1
n=2.5
m=-1.5