1 . 已知函数
,
为
的极值点.
(1)求a;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bc7f7a24e5a4c7151627d8eb2ad4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求a;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36ea2517f31e527310c6890a61f73b5.png)
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2024高三·全国·专题练习
2 . 已知
,函数
有两个零点,记为
,
.
(1)证明:
.
(2)对于
,若存在
,使得
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c46b33730f3a29b9ec3024df71375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17de16980dc347680c23b17153ef1232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aba77b36579eeccb98cdc308ce92bc8.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc043d78e4c9ad2281754d6c1cac8791.png)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedf333393bdf56f8b428e9a7d2eb3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7443588709e037203d0962bc5b3c705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c403614594d401cf38ebc4d48c2f47f3.png)
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2024高三下·全国·专题练习
解题方法
3 . 设
,当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10318825d0a61126df5ff84242e2bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfb67d216df8f78c8f8da055067edaa.png)
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解题方法
4 . 英国数学家泰勒发现的泰勒公式有如下特殊形式:当
在
处的
阶导数都存在时,
.注:
表示
的2阶导数,即为
的导数,
表示
的
阶导数,该公式也称麦克劳林公式.
(1)根据该公式估算
的值,精确到小数点后两位;
(2)由该公式可得:
.当
时,试比较
与
的大小,并给出证明(不使用泰勒公式);
(3)设
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6368fec0c2c25db7c29b014d60270e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd50a7c80712154062221f0a6ab5055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10acd6d864583617dd3e71240bf0c857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35993bd1db970330494665d925c0be7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)根据该公式估算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67aace59c071f37a444495678497ef0.png)
(2)由该公式可得:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1482fdc28b105333753fe63f72b062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483d7559ab4408d8f7fa63e14313a818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd9f874878e11c3fa25143023e8f95a.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fa50d875ad951dcd2b8202d2f0255e.png)
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解题方法
5 . 已知函数
.
(1)当
时,求
在
处的切线方程:
(2)若
在
上单调递增,求
的取值范围;
(3)若
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a52773bdacddad8d13bf15547c0ff3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53d64a8dda19c0a7fc5c4a3b07ab005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9f25e25c2c8899f163d3fd4fdadf34.png)
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解题方法
6 . 已知函数
在
处的切线方程为
.
(1)求a的值;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdb71abfbb80802d1782fc798506524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
(1)求a的值;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7a75bcd70f6b1a6d02dbb92e964e1b.png)
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解题方法
7 . 已知函数
,
(1)当
时,求函数
在
处的切线方程;
(2)若
恒成立,求实数a的取值范围;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2325d1be72eeaf624f4c2da01d7a7365.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfb7ef57b58601ab8981d92ca374e71.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69aabcfc99775b17c8077cdf45b9d09.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f77d67321eec4e4ff23715a3a0bb68.png)
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解题方法
8 . (1)证明:当
时,
;
(2)已知函数
在
上有两个极值点,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44658a47cc113e8fe2caf29eb4d95f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35e5060c242f7d8eeba3b2ef21504d9.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e92437ad44dc24c75ff808348a0983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f385eacc118fe9b5f0c23182929d6a50.png)
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2024高三·全国·专题练习
解题方法
9 . 已知函数
.
(1)证明:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e500179a7ac958616cd7dfa1dd8ca147.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1c49cf303d162268d58500834887e1.png)
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10 . 已知函数
在
处的切线为
轴.
(1)求实数
的值;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6a5d7726fe6c16df9f230cc4954f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec72ca557aa4229ee871628ffcf0d8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78f7b93cc1e59257a15b904ca84983a.png)
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