已知x^m+n=9,y^m+n=16,求(-三分之一*x^m*y^n)^2*x^2n*y^2n的值?
已知x^3m=8,y^3n=27,求(2^2m)^3+(y^n)^3-x^2m*y^n的值.
已知,单项式M,N满足2x(M+3x)=6x^2y^2+N,求M,N.
已知单项式M、N满足2x(M+3x)=6x^2y^2+N,求M、N.
已知,单项式M,N满足2x(M+3x)=6x²y²+N,求M,N
已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N
已知2^m=x,2^n=y,m,n都是正整数,m大于或等于n,求2^m-n+1的值.
已知两点M(m,1/m),和N(n,1/n)(m不等于n)关于直线y=2x+b对称,求b的取值范围.
已知x=2m-3n根号m+n+3是m+n+3的算术平方根,y=m-n+1根号m+2n是m+2n的立方根,求(x-y)的2
(x+y)(m+n)2-(x+y)(m+n)2
已知-2x^m+2n+y^3m+4n=9是关于x,y的二元一次方程,求m+n.
已知x=^m+n=3,y=^m+n+2,求代数式(1/3x^my^n)*(-1/2x^ny^m)的值
已知:单项式M,N满足2x(M+3x)=6x^2y^2+N,求M,N的值.