(1)6x n+1 -14x n +8x n-1 (2)(x+1)(x+2)(x+3)(x+4)+1 (3)(1-a 2 )(1-b 2 )-4ab (4)8a 3 -b 3 (5)3x 2 +5xy-2y 2 +x+9y-4 (6)2x 2 +xy-y 2 -4x+5y-6 (7)x 2 +x-(a 2 -a)

6x^n+1-14x^n+8x^n-1因式分解 x^(n)*x^(n+1)+x^(2n)*x 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 因式分解-6x^n+8x^n-1 因式分解2x^n-6x^n-1-8x^n-2 f(x)=e^x-x 求证(1/n)^n+(2/n)^n+...+(n/n)^n 6x的n+1次方-14x的n次方+8x的n-1次方因式分解 6x的n+1次方-14x的n次方+8x的n-1次方,急求答案 若(x^2+1/x)^n(n∈N+,n 因式分解：(x^n+1)+(2x^n)+(x^n-1) x^n+1-2x^n+x^n-1因式分解 x^n-1-2x^n+x^n-1因式分解 分解因式x^n-x^(n-1)+x^(n-2) x^n-2x^n+1,因式分解 x^n*x^n+1*(-x)^2n*x+(-x)^2n+3x^2n-2*x (8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 约分(x^n+2)+(x^n+1)-6x^n/(2x^n+1)+5x^n-(3x^n-1)