解题方法
1 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e9a049b5c04a706f5ac51bd80e4888.png)
A.存在实数![]() ![]() |
B.当![]() ![]() |
C.点![]() ![]() |
D.若曲线![]() ![]() ![]() |
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解题方法
2 . 已知函数
.
(1)求曲线
在点
处的切线方程.
(2)若
,且
存在两个极值点
.
①求
的取值范围;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88de2e42e44cb6b0a6aa29602af3b0f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50386d025cc77e756ad1141334f63324.png)
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3 . 已知函数
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f624e26d150c7fcec4fcc0848571124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
A.![]() ![]() |
B.当![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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名校
解题方法
4 . 已知
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c89a7a102428d0c3480c53fc7a9c0b.png)
A.函数![]() ![]() |
B.任意![]() ![]() |
C.若对任意![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2024高三下·全国·专题练习
解题方法
5 . 已知函数
.
(1)证明:
;
(2)若
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2839f869e743eddb510e132d3a59d2ad.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2e0bb6d63b7bcaee92a470d58cc399.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1540b6b10f07a867618a1eec02e2a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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解题方法
6 . (1)证明:当
时,
;
(2)已知函数
,若
是
的极小值点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acbfad5866c69207ec8ca7f39fe7c7d.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0172d1295992e244650b29b964afc052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知
,曲线
在点
处的切线为
.
(1)当
时,求直线
的方程;
(2)证明:
与曲线
有一个异于点
的交点
,且
;
(3)在(2)的条件下,令
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1d08d5d6fa8eb13b082985251e48a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f881b8b3ba373a24c39e8bd49dcd4903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70087bf78bee970f6ecf583ca1fccc42.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909736dad505d81be43aef91e6309bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27c0ab3e2d7698f082854bafe4174dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a4e0d114afe36b3ad5eaac27ddee8d.png)
(3)在(2)的条件下,令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde1e16eede501c9c461888148321137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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8 . 已知函数
,
,其中a为整数且
.记
为
的极值点,若
存在两个不同的零点
,
,
(1)求a的最小值;
(2)求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9f3156ad64e96aea8cdf9eb9397791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67419d367491963b4b091e3fd0704c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4588a79e160bca3711b1151a52f26b.png)
(1)求a的最小值;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a98291a95a597a74bfce7c95546f023.png)
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解题方法
9 . 已知函数
.
(1)当
时,请判断
的极值点的个数并说明理由;
(2)若
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec761e879aa6a6a25ee87106270529.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79863748bbb4f280cdbfd58bb94b84dd.png)
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名校
10 . 若函数
在
上单调递增,则
和
的可能取值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be45e70aa4bd0579e4967058f9c8e4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37558b80449f4a8942da5f32954661e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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