化简:(1-1/x)÷(x²-2x+1)/x
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
化简 (3x/x-1 -x/x+1)÷x/x²-1
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
化简【(x三次方-x平方/x平方+x )-(1-x²/x+1)】÷(2x+1/x+1)
化简:x(x^2+x)/x^2(x^2-1)
化简(x+1/x)²+2(x+1/x)+2
化简分式【(x/x-1)-(x/x²-1)】÷(x²-x/x²-2x+1),并从-1≤x≤
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
化简:x²+2x / 1+x ÷ (x - 2/x+1)
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2