x-1/5x=6.4

x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x (x/x-1)+(5x-2)/x*x-x=1 求x（有图） 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 6/x+1=x-5/x^2+x X-5+8*X=7*X-2*X-1 5/x²+x-1/x²-x=0 (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值