设函数
,
.
(1)若
,求函数
的单调区间;
(2)若
,且函数
在区间
内有两个极值点,求实数a的取值范围;
(3)求证:对任意的正数a,都存在实数t,满足:对任意的
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cd1c5271c733796702224a1fb20afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c99179b6beb5b95219b50cf0718f6a9.png)
(3)求证:对任意的正数a,都存在实数t,满足:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ecaab79bc1374b4a0001ad3293ee728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79d191df58c2dd16811fc9aa2de48b9.png)
更新时间:2020-03-04 19:30:33
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解答题-问答题
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(0.15)
名校
【推荐1】已知函数
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(1)当
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(2)设
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的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e8fb86819d9c6491322e69dff9016c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef849152f5509a13bdb8c2d5b0694c29.png)
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【推荐2】设
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(1)当
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(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d93f4c9a58325668a7a97ac88bc813.png)
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(1)讨论
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【推荐2】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bf4c6dd831ba3514e2c93e6e80e766.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bf4c6dd831ba3514e2c93e6e80e766.png)
(1)求
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【推荐1】已知
,函数
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①求
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②证明:
.
注:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5b9cd21b2617e2b3adf53a7ebbb171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd922bef7a6f219255b89522fd00fac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8787eeb5aaceec77a5c8a041a9a8c2cd.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b437bdec425f4ee18844758aef5e35.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f589ae9e5382926da76f5e43db2dde.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad5907ec47e9e02c2f43816bc016055.png)
(1)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c950d4bc0e47f3a41340149ac217f72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc98a4d9ae0580aa2c1152ffb770d4d.png)
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