[5x+1]/2+[9-2x]/3≤[3x-2]/3
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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),
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5
因式分解:x^9+x^8-x^6-x^5+x^3+x^2-1
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)