1 . 对于平面向量
,定义“
变换”:
,其中
表示
中较大的一个数,
表示
中较小的一个数.若
,则
.记
.
(1)若
,求
及
;
(2)已知
,将
经过
次
变换后,
最小,求
的最小值;
(3)证明:对任意
,经过若干次
变换后,必存在
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fde5542ad04744c14f912648f3aa0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bd66e602e9c043218806708e943c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb00071815c94c090a4095b4964fefb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7bc9573b3a8758511c63731db18183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96340894e8fb63c00d778b4d654d0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7bc9573b3a8758511c63731db18183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701ab98a2bf1135cd989822b0738e11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484c1b7bc2fc5677406e20180f667200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0624499e16b73afec432dd1afd6153d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b162d1d5bfaa7760678ea3d624beb171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5c19921380da55f5f1a00809a34503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35234a3829d238ea479fef9cec166468.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aceb3666a9d49ef40c39eac116ccd5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a887552671e6d4df390320ee9a36150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f389ec068eb1d1aa586b79097d70a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcd78ec8777a8e6e5b32222cdb15c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06296b9023c1dca6f44b8297842bef7c.png)
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解题方法
2 . 已知函数
.
(1)若函数
有三个零点,求a的取值范围.
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3deac95b6488965843da49d364c0183c.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0384a0466920e5bf00231a5c5bf77969.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969e0ea877612922fe8b9d36ff188d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ec808ad60dbf016632ec816eaca1df.png)
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2022-04-08更新
|
1328次组卷
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3卷引用:广西钦州市第四中学2021-2022学年高二下学期2月月考数学试题(理科)
名校
3 . 已知函数
,(其中a为非零实数)
(1)讨论
的单调性:
(2)若函数
(e为自然对数的底数)有两个零点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453eb269ce3b10fbc1ae07c7bbc564e.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5af7cb1d3d051614696cd4761b3f559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbf0c24f43ad10d80e102de94df3522.png)
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2022-03-09更新
|
1078次组卷
|
3卷引用:广西钦州市第四中学2021-2022学年高二下学期2月月考数学试题(理科)
名校
4 . 已知函数
为自然对数的底数).
(1)当
时,判断函数
的单调性和零点个数,并证明你的结论;
(2)当
时,关于x的不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e2160ef1397c2e9af0824f4488a8d8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdc12d82e20e4ebc76e5792d4e8e09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92382c9fe8a54d85a03d2d96d6b5d4b3.png)
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2022-01-21更新
|
1346次组卷
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5卷引用:广西壮族自治区钦州市第四中学2023届高三上学期11月考试数学(理)试题
解题方法
5 . 已知
.证明:
(1)若函数
有极大值
,则
;
(2)若函数
没有极值点,则对任意的
,都有
;
(3)若
,则
在区间
内有且仅有一个实数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e955fc202c38ef3a0f001ec665fd13.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7417645b760b0e03cfe0bcdaa6a1d93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133cb4bfa780967fce1ef6181f2cf545.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b06c7267bc6d924a744d4d6c1d46b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eab1a6c9644f88a05790e874bfe5ad.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08734d2b47153347ae80f6a59e308367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803a468e5d66004e57372a5bf2c5e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d7e6f67fb44c0d29eefe70b7b2f025.png)
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2021-11-05更新
|
510次组卷
|
3卷引用:广西钦州市第四中学2021-2022学年高二下学期2月月考数学试题(理科)
名校
6 . 已知
在区间
,
上的值域
,
.
(1)求
的值;
(2)若不等式
在
,
上恒成立,求实数
的取值范围;
(3)若函数
有三个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb39dd7a9741c2e6796ce20a0910971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f124fb9eab689c537bb5ddf5012e35f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d141db3e7187a57e67798d8844073d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17fff6cad52af74309c2d811fa5e508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4caee21c29aa2410ea04b3fc2d80cd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f4b72bb19e180dc63e6d8e1ede1339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e96e9a314387fa1c76e86179ee0121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a89c09d40f1ca26c70beadd071658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccafe91e5e154bc67b273df39fb16a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2020-09-22更新
|
1768次组卷
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9卷引用:广西壮族自治区钦州市第四中学2023届高三上学期10月考试数学试题
广西壮族自治区钦州市第四中学2023届高三上学期10月考试数学试题江苏省苏州市2016-2017学年高一下学期期末备考试题分类汇编:函数的零点数学试题江苏省盐城市伍佑中学2017-2018学年高一上学期期末考试数学试题(已下线)2017-2018学年度下学期高中期末备考 【浙江版】高一【精准复习模拟题】 拔高卷01【教师版】【全国百强校】四川省雅安中学2018-2019学年高一上学期期中考试数学试题甘肃省天水市第一中学2017-2018学年高一上学期第二次考试数学试题甘肃省天水一中2017-2018学年高一(上)期中数学试题江苏省苏州外国语学校2020-2021学年高一上学期12月检测数学试题(已下线)专题2-7 导数压轴大题归类-2
名校
7 . 已知函数
.若
在
只有一个零点,则
的值为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fa4137b76d72ae83f9358c4b2aa74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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8 . 分别过椭圆
左、右焦点
的动直线
相交于
点,与椭圆
分别交于
与
不同四点,直线
的斜率分别为
,且满足
,已知当
与
轴重合时,
.
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527841394688/1572527847522304/STEM/76afd044-edb7-4edb-8b99-a9ca3499603d.png?resizew=188)
(1)求椭圆
的方程;
(2)是否存在定点
,使得
为定值?若存在,求出
点坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e1e3549cff3812975d517715199c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca32ffa13c674d0cd1f8db232f216b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c65902e35640cf2c8d4111c36b40145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045f68fe6ecac70c5557ab905f1d2ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6f7bc5a1d6b60dea5ae653f2f72702.png)
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527841394688/1572527847522304/STEM/76afd044-edb7-4edb-8b99-a9ca3499603d.png?resizew=188)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)是否存在定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1b3031d7393a63719166285314d73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
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