3+4X=27 9N-3N=4.2

(8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 3+4X=27 9N-3N=4.2 3×9^n×27^n-1=3 x 3^2n x 3^(3n-3) 怎么转换的 设n为正整数,且x^3n=4,求x^2n·x^4n+x^4n·x^5n 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= 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x^3n=2,试求x^6n+x^4n乘以x^5n的值 x的^3n=2,求x^6n+x^4n*x^5n的值 设集合M={x|x=2n+1,n∈N},N={x|x=3n,n∈N},则M∩N= 已知x^n=2,求(3x^3n)^2-4(x^2)^2n 若x^2n=4,求x^6n和(3x^3n)^2 已知x^n=4,求x^2n,x^3n的值 x^2n=5 求(2x^3n)^2/4x^2n 3N+2=X 5N+4=X 7N+6=X 9N+8=X 11N=X求解N X 各位哥哥姐姐叔叔阿姨帮帮忙 (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! n+(n+1)+(n+2)+(n+3)+(n+4)=5n+10这道题怎么解 n(n-1)(n-2)（n-3)（n-4)=154440.求N值 要步骤