1 . 已知函数
.
(1)求函数
的单调区间;
(2)若不等式
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb727c12898baef8941abfb6330a6ce8.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c9008a8122ebaba65a0fe52203870a.png)
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2022-05-30更新
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2卷引用:江苏省2022届高三高考前临门一脚数学试题
名校
2 . 已知
,
(1)求
在
处的切线方程以及
的单调性;
(2)令
,若
有两个零点分别为
且
为
唯一极值点求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b8ef4c0ab9333ce61970ecf54c0a48.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea9824af71c9da5db5a00ec06063024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec3dd08243ce7e9ba69ad79edc70d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04ddd92ea0665845393e47f4b4a7679.png)
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名校
3 . 已知函数
,
,
.
(1)求
在
的单调性;
(2)若
,试讨论
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b454b32cadad13baa8169c13b3c5fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e436b9a4b5ca59138de988bd0a19637e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d165b3397aab477869842a16b7ff6aa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3f81841df5843d6058e09161bb9c21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3d6f08a6657d41a177a7c5e246e6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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4 . 已知函数
,
.
(1)当
时,证明:
;
(2)若函数
在
内有零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f55dc640103e9a63ebd458bd1169613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bda069d5d80c502d9c255d2cea8174.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2763b57a7399653fbded5264f0cee150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2022-05-26更新
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2卷引用:山东省济宁市2022届高三模拟考试(三模)数学试题
名校
5 . 已知函数
.
(1)求函数
的单调区间;
(2)当
时,证明:函数
有两个零点;
(3)若函数
有两个不同的极值点
(其中
),证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24bcebb1b04e3b700973b082889dd13.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9fdd2e38a61463831412e20f5e4184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6aa7bfe9c31035b89c59f413242f7e.png)
![](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/d277c051b0c07ce2983f33470a343aa1.png)
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2022-05-24更新
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4卷引用:天津市环城七校联考2022届高三下学期第二次质量调查数学试题
6 . 已知函数
.
(1)当
时,求
的单调区间;
(2)设函数
在
处的切线与x轴平行,若
有一个绝对值不大于4的零点,证明:
所有零点的绝对值都不大于4.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d362a94148a3ecc3e7ea94e07e546e2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbed861eb0309fed36053788b0f1fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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2022·全国·模拟预测
7 . 已知函数
,
.
(1)若
,求
的单调区间与极值;
(2)令函数
,若存在
,
使得
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce901f67aae4b04a9aa5c64909e7698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b053fcfbdb442f5e40dbff4408b94fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)令函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02aa2ef357da793375a4471d7a242b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5f4aadc17b6d5c9760a75fab7fb760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce088c5ec0273d49b10d83921b566b8.png)
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2022·全国·模拟预测
8 . 已知函数
,
.
(1)讨论
的单调性;
(2)若函数
的图象总在函数
的图象的上方,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230e114779bc88486d1b4341f60949fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789d64b23168eeee32662459a0493b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
9 . 已知函数
在
处取得极值.
(1)求
的值及函数
的极值;
(2)设
有三个不同的零点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c9c0e5a032d8744a9dd2c95a08ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acfe9ce15c7eaf2a531aad1011d1be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c06ceee2b1e227de025476eee95672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799f93049fa4028519ee3044f992dc34.png)
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2022-05-16更新
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2卷引用:河北省张家口市2022届高三第三次模拟数学试题
10 . 已知函数
.
(1)若
,求函数
的单调递增区间;
(2)(ⅰ)若
是函数
的极大值点,记函数
的极小值为
,求证:
;
(ⅱ)若
在区间
上有两个极值点
.求证:
.(提示:
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a6abb93600758c07e77d52016f656a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)(ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572fc201b7d09a4d6d5efbe8a9ea249d.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1994ff05707f1d2a51716c24623974e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e8604fdbde4e591ce5dddcf0edec02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84ea00838d82c19ebdf3c24a70eafc8.png)
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2022-05-12更新
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2卷引用:浙江省金丽衢十二校2022届高三下学期5月第二次联考数学试题