化简（ xx−1 ﹣ 2x+2x2−1 ） ÷x−2x2−x 的结果是_刷题宝

题干

化简（ −

x

x

1

﹣ −

2

x

+

2

x

2

1

） ÷−−

x

2

x

2

x

的结果是（）

A：x

B： $\frac{1}{x}$

C： $\frac{x + 1}{x - 1}$

D： $\frac{x - 1}{x + 1}$

上一题下一题 0.0难度选择题更新时间:2016-04-26 06:30:10

答案(点此获取答案解析）

A

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