观察下列等式:
第1个等式:
;
第2个等式:
;
第3个等式:
;……
(1)探寻上述等式规律,写出第5个等式:______;
(2)猜想第n个等式,并证明你的猜想;
(3)探究并计算:
.
第1个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d842b2e150d723c948234ee36f4b6b0c.png)
第2个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61dfa259a7cfab28fe63ff7d6211b1a.png)
第3个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f4890678dc22224b4d23a8c38fbf11.png)
(1)探寻上述等式规律,写出第5个等式:______;
(2)猜想第n个等式,并证明你的猜想;
(3)探究并计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b84fa4737fb94d3eb7188ce94fe5cc8.png)
更新时间:2022-03-26 21:34:21
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解答题-问答题
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适中
(0.65)
【推荐1】 按下图方式摆放餐桌和椅子:
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您最近一年使用:0次
解答题-问答题
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解题方法
【推荐2】一列数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb2df9b768a9bad572e458b6509a20a.png)
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(2)
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解答题-证明题
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【推荐2】观察下列等式,探究其中的规律:①
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﹣1=
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﹣
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﹣
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(1)按以上规律写出第⑧个等式:_______;
(2)猜想并写出第n个等式:_________;
(3)请证明猜想的正确性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5296c0056db0e2b5331c9b9a6d45962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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(1)按以上规律写出第⑧个等式:_______;
(2)猜想并写出第n个等式:_________;
(3)请证明猜想的正确性.
您最近一年使用:0次