x/(x+3)-18/(x^2)-9=1
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18
(x-3)(x-2)+18=(x+9)(x+1),X是多少啊?
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/x+3-x+1/x+2=x+8/x+9-x+7/x+8
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
2x/x^2-9=x-1/x^2-6x+9-1/x+3
1.x/9+x=62.x/x+1 + x+1/2x = 3
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
0.75x-1/2x=-5;3x+5=4x+1;3X+5=4X+18;1-7x=x-7;9x+8-7x=3x;-(x-2