已知函数
,其中
且
.
(Ⅰ)讨论
的单调区间;
(Ⅱ)若直线
的图象恒在函数
图象的上方,求
的取值范围;
(Ⅲ)若存在
,
,使得
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d40cf415a78d3ed9d5bef4ce48f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(Ⅰ)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1447dbe580ac5c825776995118e75acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8df447ac6961617b4dbec0d5ab19eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e71b7cc594da8081cc8599f6e2c529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ec808ad60dbf016632ec816eaca1df.png)
16-17高二·黑龙江双鸭山·阶段练习 查看更多[2]
更新时间:2017-02-08 09:37:33
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