化简分式【(x/x-1)-(x/x²-1)】÷(x²-x/x²-2x+1),并从-1≤x≤
化简分式【(x/x-1)-(x/x²-1)】÷(x²-x/x²-2x+1),并从-1≤x≤
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2
分式计算:x分之x²-1乘x+1分之x+(3x+1)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
(x-1)²/x(x²-1)×x+x²/x-x²分式的乘除
化简分式x²-1分之x²+x
分式计算 1-x/x²+x-2÷x²-1/x+2
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
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)
化简 (3x/x-1 -x/x+1)÷x/x²-1
化简求值 (x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1) x=-2
分式化简:(1)1/x-1/(X+1) (2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x