已知
.
(1)求函数
在
上的最小值;
(2)对一切
恒成立,求实数
的取值范围;
(3)证明:对一切
,都有
成立.
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/b2298f781ef14a6b81206b903f4ef66b.png)
(1)求函数
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/0562df9f22894fde839b6b1f939bdb24.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/6a3310f2c84f44f5b50743d2e691383d.png)
(2)对一切
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/ce4fb0f780474709ba7522636d7cff2e.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/1d9d6b20e11b4c75a0b1e2553d919338.png)
(3)证明:对一切
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/015629bd37164ef9bca33b26616c34cc.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/8c9bffeed2f147c585867635a1689279.png)
11-12高二下·江西抚州·期中 查看更多[2]
更新时间:2019-01-30 18:14:09
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