已知函数
.
(1)讨论函数
在
上的单调性;
(2)设函数
存在两个极值点,并记作
,若
,求正数
的取值范围;
(3)求证:当
时,
(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009aeb6c572f18f505f7e84c2b5f9d0.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87daa52ae46b1c11c9f411f451abc73b.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b194c27663e65b0d79d457b8c738a590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d17e179f1a6ad3a060e2d993e02bdf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
更新时间:2017-05-16 19:31:50
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【推荐1】已知函数
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(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
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(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1dd754362549d8fb06c522c6c4bd33.png)
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(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
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【推荐2】已知
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②
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