已知函数
,
是
的导函数.
(1)若函数
极小值为-1,求实数
的值;
(2)若
,不等式
恒成立,求实数
的取值范围;
(3)设函数
,求
在
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60a0bb7e3a84ab5c464c96a62ee36b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f7ad1ef307531cdf723fe6f17bc7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7d2bb9fd6de312a742ef10c81b9b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc64ec0016d4c1d1467f575ff4bd7a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b988ad1716d09dca0d331ea2d9763c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad814089e37543b2f547af9ae75b6dd0.png)
更新时间:2021-08-20 18:04:11
|
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解答题-证明题
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适中
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【推荐1】【江苏省南通、徐州、扬州等六市2018届高三第二次调研(二模)测试数学(文理)试题】设函数
.
(1)若函数
是R上的单调增函数,求实数a的取值范围;
(2)设
,
是
的导函数.
①若对任意的
,求证:存在
使
;
②若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66a70894b38231f6ae3d11132900f4b.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e14fd7b08b0d6855527d8539e41fdbb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d277d705b675814b3c245884df649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42154a94c4fe115ba9b54c2910d0ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbf3e4121fa33f14ec6474d07c70f64.png)
①若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8d76ec2d91d204db285fc88770f49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ec51c9f5a1300ae369f99be27c670f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec273c5a0d32646329c75d830618210.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7476f3dfca96d7e9edc93b3db4b93bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba56f8b70d256d9c278adc2de0548a78.png)
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【推荐2】已知函数
,
.
(1)讨论
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a5cfe3859e67aedefd82ec9cb6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5179a1aa18466d91a92f81532a7b5b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3a5c22762b37be47859601bb1ebeec.png)
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【推荐1】已知函数
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(1)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910c7e286a68c5c9d9c2a46910b282e4.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9afb528423ed6c19355ca8bd8f2359.png)
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(2)假设对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8651ee6ef370b557508a04e3e0aa33f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b05b085255615e67cce634a059d65c.png)
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【推荐2】已知函数
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解题方法
【推荐1】已知函数
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dba7709740cad59b4fbf237c46ffad6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08596b491633ee35708299083df5db34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68cb9f9f7935fd5703f46181db6e4db.png)
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【推荐2】已知
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