1、2x²+5x-7
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
1、2x²+5x-7
(x+1)(x+2)(x+5)(x+7)+15 因式分解
因式分解 (x+1)(x+2)(x+5)(x+7)+15
X-5+8*X=7*X-2*X-1
1/x²+x+1/x²+3x+2+1/x²+5x+6+1/x²+7x+12,分式
(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
(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
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
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),