已知函数
,
,
.
(1)若函数
在
处的切线与
的图象相切,求
的值;
(2)当
时,记函数
的最小值为 r.
①求证:
;
②求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7c4adef3485e8ac6e50d1926365327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6076528c51f65d3fa136ff15185ccbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192099758b5e10bff9df9b5ec8fb273f.png)
②求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee56d2d0f478fd9261f5545ff9c8804.png)
更新时间:2021-02-06 10:12:05
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【推荐2】已知
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
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