在化简分式
时,甲同学的解法如下.阅读甲同学的解法,完成下列问题.
解:原式=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979237274c0cd66ea07557d7764e1b48.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7967eff64b86764e41b2e5ed91ed70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648d28d4da71b40bc0cb750852417026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf3d6e8a43f40d0db191395393de628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78643906165938943e9af152da436078.png)
(1)甲同学从第 步开始出错(填序号);
(2)请你写出正确的解法.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62696ade93fda72ee763e5beb3de8552.png)
解:原式=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979237274c0cd66ea07557d7764e1b48.png)
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7967eff64b86764e41b2e5ed91ed70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648d28d4da71b40bc0cb750852417026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf3d6e8a43f40d0db191395393de628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78643906165938943e9af152da436078.png)
(1)甲同学从第 步开始出错(填序号);
(2)请你写出正确的解法.
更新时间:2023-01-19 16:12:32
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【推荐1】.观察下列式子:
,
,
,......
用你发现的规律解答下列问题
(1)第4个式子是:____________,第n个式子是:____________.
(2)用这个规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b0708bd90d7ffcd9067cff3a6e4eb3.png)
(3)探索并计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d842b2e150d723c948234ee36f4b6b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61dfa259a7cfab28fe63ff7d6211b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f4890678dc22224b4d23a8c38fbf11.png)
用你发现的规律解答下列问题
(1)第4个式子是:____________,第n个式子是:____________.
(2)用这个规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b0708bd90d7ffcd9067cff3a6e4eb3.png)
(3)探索并计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa4ce6c88c8988cc1d937989c2ff019.png)
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