化简
=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6c4e7d1759c803fcda86da0d7a86f0.png)
更新时间:2019-05-20 15:35:01
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适中
(0.65)
【推荐2】人们把
这个数叫做黄金分割数,著名数学家华罗庚优选法中的0.618法就应用了黄金分割数.设
,
,得
,记
,
,…,
,…,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059cc1b6ac5deac91173f1b613a427de.png)
________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95405ea0b6665d93efdf9c9e89f37a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2c3f6507cd5bf7af07679e5dcb230a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca27cc54ca0332245f5167488daa3408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606bfaf6aae01a1c8610bd33b60103a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a601b32951c93567083a7b73f4126e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13197832bd65f84da3399c8541313a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059cc1b6ac5deac91173f1b613a427de.png)
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