x-1/2=9 x+1/3=1

x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 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), x+2/x+3－x+1/x+2=x+8/x+9－x+7/x+8 （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 2x/x^2-9=x-1/x^2-6x+9-1/x+3 1.x/9+x=62.x/x+1 + x+1/2x = 3 (x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980