已知X^M=5.X^N=3.求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^M=5.X^N=3.求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=1/3,x^n=2,求x^2m+3n 已知x^m=3,x^n=6,求x^(3m－2n) 已知x^(m+n) =57,x^m =19,求x^3n的值 已知x^(m+n) =57,x^m =19,求x^3n的值 已知x^m+n×x^m-n=x^9,求m的值. 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)=6x²y²+N,求M,N 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^2 求M N 1.已知M/N=5/3,求M/M+N +M/M-N -N平方/M方-N方 的值.2.已知X+1/X =2,求X方+1/X方的值.3.已知3X-4/(X-1)(X-2)=A/X-1 +B/X-2,求实数A、B. 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知x^m=9,x^n=6,x^k=2,求x^m+2n+3k 已知:M=3x²+2x-1,N=-x²-2+3x,求M-2N 已知m=3x^2+2x-1,n=-x^2-2+3x,求m-2n