11/5x(1/3+1/2)+5/11÷(-5/4)=?

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 x的平方-2x+1=15 ; x(2x-5)=4x-10 ; x的平方+5x+7=3x=11 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 2x平方+3x=3 (用配方) x(2x-5)=4x-10 x平方+5x+7=3x+11 1-8x+16x平方=2-8x 1+2x+3x^2+4x^3+5x^4+6x^5+7x^6+8x^7+9x^8+10x^9+11x^10当x=-1时的值 求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1 3x(7-2x)+5x(2x-1)=4x(x-3)+5 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),