2.5x+1=6x-13
2.5x+1=6x-13
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)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
6/x+1=x-5/x^2+x
(x+7)(x+6)-(x-2)(x+1)=?
x平方-x+1=x平方-x分之6
(x+2)(x-3)(x-6)(x-1)=0
X^2+X分之6=X^2+X+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