4x^n+3-12x^n+2+9x^n+1

9x^(n+3)-12x^(n+2)+4x^(n+1)因式分解 4x^n+3-12x^n+2+9x^n+1 (8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2) 因式分解4x^n+2-9x^n+6x^n-1-x^n-2 (4x^n-2x^n-1-3x^n+2)÷（-5x^n-1) x^n-1(3x^n+4x^n+1-5x^n+2) 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*} (x^4n/x^2n)*x^n x^2n-3x^n 将下列各式分解因式4x^n+3-12x^n+2+9x^n+1 x^n*x^n+1*(-x)^2n*x+(-x)^2n+3x^2n-2*x 4x^n+2-9x^n+6x^n-1-x^n-24x^(n+2)-9x^n+6x^(n-1)-x^(n-2),n是整数且大于2 (-x)^3x^n-1+x^2n(-x)^3 f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n 因式分解：x^(2n)+(2x)^(n)+4^(n-1) x^2n+(2x)^n+4^(n-1) 因式分解 设n为正整数,且x^3n=4,求x^2n·x^4n+x^4n·x^5n