计算:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654217aae20fc5fa244a5ccd7ac38493.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df74f054b86b26879cec1fd5cfee2a2.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3607558e9abba01ed6dd83d5d3376.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfede21da7bb9b33a0885ae0961d57f.png)
23-24八年级下·全国·假期作业 查看更多[2]
更新时间:2023-12-27 20:05:16
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【推荐1】观察下列一组式子的变形过程,然后回答问题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9fe72d3a9110de44f9f60f3f3d81da.png)
(1)求
__________;
(2)请你用含n(n为正整数)的关系式表示上述各式子的变形规律:______________;
(3)利用这一规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f46d2748c9411018b3bb2134cbd662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca84e2db65efe3647aba894f55071678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b76a425906a6acab27fbd1b3a06173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9fe72d3a9110de44f9f60f3f3d81da.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ece205a7985bd919400c14b44068aa.png)
(2)请你用含n(n为正整数)的关系式表示上述各式子的变形规律:______________;
(3)利用这一规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95677ab8c24a82269659f44e1e74657.png)
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