M={(x,y)|(y-3)/(x-2)=a+1},N={(x,y)|(a^2-1)x+(a-1)y=15},若M交N=空集,则a=?

计算：(y-x)^3(x-y)^m-(x-y)^m+2(y-x) (Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2 x+y=m,x-y=n,那么2x-3y等于 x+y=m,x-y=n,那么2x-3y等于多少 X^3*y^(m-1)*x^(m+y)*y^(2n+2)=x^9y^9 4m(x-y)-2m^2(y-x)^3 已知M={(x,y)|y=-x^2+mx-1},N={(x,y)|y=-x+3,0 关于X,Y的方程组3X+2Y=2m+5与x-y=4m-5的解x,y满足x+2y 若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m,n的值 已知x^(3m)=2 y^(2m)=3 求（x^(2m)）^3+(y^m)^6-(x^2*y)^3m * y^m 将x=y代入2x-y=-3m,2y-x=3m+3 m=? (x-y)m次方(y-x)2m次方+(y-x)3m次方得几 计算(x-y)^m(y-x)^2m+(y-x)^3m 解x,y的方程组x+2y=3m,x-y=9m,可得x=_____,y=_____没说用m表示,是否可以说是x=3m-2y,y=x-9m y=x平方-2x+m 设M={(x,y)||x|+|y| x^n*y*(-x^2y^m) 填空：1.（1）2m（y-x）^2=（ )(x-y)^2填空：1.（1）2m（y-x）^2=（ )(x-y)^2（2）-2m(y-x)^3=( )(x-y)^3( 3 ) (x+y)(y-x)=-(x+y)( )( 4 ) -m(y-x^2)=m( )