若-2X^4Yn^-1与3X^m+nY^2是同类项,则m=______,n=_____.

问题描述:

若-2X^4Yn^-1与3X^m+nY^2是同类项,则m=______,n=_____.
若-2X^4Yn^-1与3X^m+nY^2是同类项,则m=_____,n=_____.
当k=_____时,多项式x^2+3KXY-2Y^2+6XY-1中不含XY项.

1.m+n=4,n-1=2
m=1,n=3
2.k=-2