若2x^3n=8,则2x^9n=

若x^m=6,x^n=9,则(2x^3m*x^2n) / (x^m*x^n)^2*x^n (8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 已知集合P={x|x=2n,n∈N^+},集合Q={x|x=3n,n∈N*}.则P∩Q等于多少?,A,{x|x=n,n∈N*}B.{x|x=5n,n∈N*}C,{x|x=12n,n∈N*}D,{x|x=6n,n∈N*} 若A={x|x=2n,n∈N},B={x|x=3n,n∈N},C={x|x=4n-2,n∈N}则(A∪C)∩B= 若A={x|x=2n,n∈N},B={x|x=3n,n∈N},C={x|x=4n-2,n∈N}则(A∪C)∩B= 设集合M={x|x=2n+1,n∈N},N={x|x=3n,n∈N},则M∩N= 若集合P={x|x=2n,n∈N},T={x|x=3n,n∈N},则P∩T= 若集合A={x|x=3n+1,n∈N},B={x|x=3n-2n∈N},则A∩B 若2x^3n=8,则2x^9n= f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n 若(x^2)^n=x^10则n等于? 若x^3n=2,试求x^6n+x^4n乘以x^5n的值 若x^2n=4,求x^6n和(3x^3n)^2 若X^n=2,y^n=3,则(xy)^n=（ ）,(x^2y^3)^n=( ) 若x^n=2,y^n=3则1 .(xy)^3n (3x^3n)^2+4(x^2)^2n1 .(xy)^3n 2.(3x^3n)^2+4(x^2)^2n 设集合A={x|x=2n,n∈N,},B={x|x=3n,n∈N,},则A∩B等于? 若(x+m)(x-5)=x^2-2x+3n,则m-n=正确结果是8, (6x^2n-24)/[x^(2n+3)+6x^(n+3)+9x^3]×(x^n+3)/(x^n-2)÷(3x^n+6)/[x^(n+2)+3x^2]哪位大虾会的= =(6x^2n-24)/[x^(2n+3)+6x^(n+3)+9x^3]×(x^n+3)/(x^n-2)÷(3x^n+6)/[x^(n+2)+3x^2]不知道哪根葱能出出这么令人吐血的题目!