x²+3x+1/2+x²+5x+1/6+x²+7x+1/6=1/3x

|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 (（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
6x+(2x²-3x)-(x²-1) 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 代数式6x+2x²-3x+x²+1,其中x=-5 x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x) 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), 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7)