3x+2>2x -(x-4)≧-1
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-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
几道解不等式|x+1|>x|x-1|+|x-2|=7(X^2-2x+1)(x+1)^3(2-x)/[(X+4)(X^2-
先化简再求值(3x+4/x²-1-2/x-1)*x-2/x²-2x+1,其中x是不等式组{x+4>0
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002