1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+···+1/(x+2010+(x+2011)
【(Xˇ2-X)/x】 ·【 x/(X+1)】+【(3x+1)】
1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+···+1/(x+2010+(x+2011)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
(x)-2x·x-x-2x+1=0求x的值,
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
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
计算(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1); (3x-y)(y+3x)-(4x-3x)(
1+x+x^2+x^3+.+x^99+x^100
计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+2010)(x+2011)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(x-x²-1/1-x)·x²-2x+1/x²-x+1