已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值;(2)求x^3m-2n的值
已知x的m次=3,x的n次=6,求x的m-n次,x的3m-2n次的值
已知x的平方-6x+m=(x-2)(x-n),求吗,m,n
已知单项式M,N满足3x(M-5x)=6x^2y^3+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)=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x^m=6^-1,x^n=1/3^-1,求x^3m+2n的值
已知x^m=2,x^n=5,求x^3m+x^2n的值?
已知:单项式M,N满足2x(M+3x)=6x^2y^2+N,求M,N的值.
已知x^m=2,x^n=3(m、n是正整数),求:(1)x^2m=3n;(2)x^2m+x^3n.