已知
,
.
(1)当
时,求
;
(2)若
,求当
为何值时,
的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e2d7343d2f1d121f3526419da6f83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d191f7fd99e84dcae8c32730408b71.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c63e1c64c42b7f3b7fdc396d4756cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3285f77442c34639eef093f5f26c7802.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c53a58b6cc214bdef21fc1c35f26190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8b4bbd2f9912adfc9864c0e1e76a9d.png)
更新时间:2016-12-04 03:48:34
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