已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eef5a2de7b56b00b79a0302be47bb75.png)
(1)当
时,求曲线
在点
处的切线方程;
(2)求证:函数
存在最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eef5a2de7b56b00b79a0302be47bb75.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
更新时间:2022-06-20 22:32:43
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适中
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(I)若
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适中
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