为了求
的值,可采用下面的方法:
设
①
得,
②
得,
.
∴
.
(1)请直接写出:
________.
(2)运用上面的计算方法求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a85fc8eb818a814219d57492198cc6.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b84f21a5d227dd4f8d58a87b982826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d6609469a7908dffe57ee8cdfcf3014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00759d57a43dabaaf3113dfa9e709a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b3617db740a784dc02e35309c9c585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3d646c0ba01fd74b78c1f3a2366d33.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd62ed62b0342a0b3fb8332c17f8b83f.png)
(1)请直接写出:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f84d5d0072fa6692f8bbbb4700c1e54.png)
(2)运用上面的计算方法求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2faf4707039f5ecf750e403dd8986f99.png)
更新时间:2023-04-21 23:07:03
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【推荐1】我们知道
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,
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用含有
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用含有
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62596fa32b5936b5d03d0b742c84c708.png)
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解答题-证明题
|
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名校
解题方法
【推荐2】观察下列算式:
①
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②
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③
;
……
按照以上规律,解决下列问题:
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②
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③
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……
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(2)根据这个规律写出你猜想的第n个算式(用含n的式子表示),并证明.
您最近一年使用:0次