m/(x+2)+n/x-3=3x+1/(x+2)(x-3) 则1/mn的值为?

x^m×(x^n)^3÷[x^(m-1)×2x^(n-1)]= 已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值；（2）求x^3m-2n的值 设集合M={x|x=2n+1,n∈N},N={x|x=3n,n∈N},则M∩N= 已知x^m=1/3,x^n=2,求x^2m+3n 多项式x^2-4x+3=(x+m)(x+n),m=?n=? (2x-3)(x-n)=2x^2+5x+m求m与n (x-m)(x-1)=x²-3x+n,则m+n的值为? m=2x+1,n=x-1且m-3n=0求x和m+n! m=2x+1,n=x-1且m-3n=0求x和m+n 若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n 已知m=3x^2+2x-1,n=-x^2-2+3x,求m-2n 已知:M=3x²+2x-1,N=-x²-2+3x,求M-2N (1-3x/x^2-1)=(M/x+1)+(N/x-1),求M,N的值 已知x^2-4x+3=(x-1)^2+m(x-1)+n,求m、n的值 若(2X-M)(3X+1)=6X的平方+5X+N,求M,N 若(2X-M)(3X+1)=6X的平方+5X+N,求M,N 设全集为R,集合M={x|2x>x+3},N={x|-1 设集合M={x/ln(x+3)},N={x/2x-1