3x^2n-1 y^m与-5X^m y^3是同类项,那么3x^2n-1 y^m-（-5x^m y3）等于___急

若3x^m+1y^2与x^3y^n的积是单项式3x^5y^5则n^m+m^n= 2m+n 5 3 2m-n诺4x y 与x y 是同类项,m/n= 若2x^m-n+1y^3m-2n-5与-3x^n-1y是同类项,则m=___,n=____RT 已知1/2x^3m-1*y^3与-3/5x^5*y^2n-1是同类项求m^n+n^m的值 已知-5x^2m-1 y^n与11X^n+2 y^-4-3m的积是同类项,求2n-m-9 若单项式mx^n+1y^2m+5与x^3y的和为单项式m-n= 已知-4x^(m+2)y^(3m-n)÷[-2x^(5m)y^(2m+n)]的商与-(1/2)x^3y^3是同类项,求m+n 已知-4x^(m+2)y^(3m-n)÷[-2x^(5m)y^(2m+n)]的商与-(1/2)x^3y^2是同类项,求m,n的值 已知-4x^(m+2)y^(3m-n)÷[-2x^(5m)y^(2m+n)]的商与-(1/2)x^3y^2是同类项,求m+n的值.如题 已知-3x^m-2ny^n-2与5分之1x^5y^4-m是同类项,求(m-2n)的平方-5(m+n) 若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____ 为什么x^ m+5与x^ 3相等 1.M={y/y=x²-2x-1},N={y/y=x²+2x+3},求M与N的交集2.M={(X,Y)/Y=X},N={(x,y)/y=2x-1},求M与N的交集3.M={x/y=根号（x-2）},N={x/y=根号（3-x）份之一},求M与N的交集 若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____ 3x^m+5y^2与x^3y^n的和是单项式,则n^m= 3x^m+5y^2与x^3y^n的和是单项式,求m,n各是几? 3x^(m-5)y^2与x^3y^n的和是单项式.则m^n=? 已知 8x^2y^3 与 -3x^m+1y^n+1 是同类项,则m+n= 若代数式2x^2 y^m与-1/3x^n y^3是同类项,则m+n=