(x-3)/2+(2x-4)/3+(3x-5)/4+……+(8x-10)/9=(3x-1)/2+(4x-2)/3+……+
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
f(x)=1+x-x²/2+x³/3-x^4/4+…+x^2013/2013
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
观察下面三行单项式:x,2x^2,4x^3,8x^4,16x^5,32x^6,…(1) - -2x
计算1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+……+1/(x+2007)(x+200
1x+2x+3x+4x+5x+6x+7x…+99x=100
x(2x-5)>2x的平方-3x-4 (x+1)(x-3)+8x>(x+5)(x-5)-2 解不等式组