x+7÷ x^3+5x^2+7x+3

|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 2x+3x+4x+5x+x+6x+7x=100 x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少 (（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
(x-2)(x-3)/(x+5)(x-7)＞0 (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 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 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+4x+2/x^2+4x+3-x^2+7x+5/x^2+7x+6