1/2-x=1/x-2-6-x/3x²-12

解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x (（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
解方程：x(6-x)-2x(x+1)-(x^3-3x^4)/x²=4 6x+(2x²-3x)-(x²-1) |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-6)(x-1)=0 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 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值