名校
1 . (1)求证:已知
,
,
,
,
,并指出等号成立的条件;
(2)求证:对任意的
,关于
的两个方程
与
至少有一个方程有实数根(反证法证明);
(3)求证:使得不等式
对一切实数
,
,
都成立的充要条件是
,
,
且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941b8c37cb9b036a5d7faa7eac01fa6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878f834c03d26711f64bb3abe20e5488.png)
(2)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace8f8a779c8f039407b7cae737d7212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751ee06608e9b40cd42cc4b48165e37c.png)
(3)求证:使得不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e774028355336f9a47e4e5194f3e7b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff8a8a07e9fab2efc5be33f1339112f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ad8d91c1ce139fbf2382a6e8a8f674.png)
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10-11高二下·福建三明·阶段练习
2 . 先阅读下列不等式的证法,再解决后面的问题:
已知
且
,求证![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c6c22cb280913922a6b95344ad0997.png)
证明:构造函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dba68d676bf9e77c974fb7cc1da4ee.png)
因为对一切
,恒有
,所以
,从而![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c6c22cb280913922a6b95344ad0997.png)
(1)若
,且
,请写出上述结论的推广式;
(2)参考上述证法,对你的结论加以证明;
(3)若
,求证
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c38216ac0eb2bcaa85fd8c61901f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e5dadfc7d9b12bea102cc0ce5bfcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c6c22cb280913922a6b95344ad0997.png)
证明:构造函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dba68d676bf9e77c974fb7cc1da4ee.png)
因为对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00148b121ca924133dfc93af99e7cb40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c6c22cb280913922a6b95344ad0997.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b2509af4d6b78ffe1fc3b4ca7301c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4b9eca505fbff0bff1d2724d7155eb.png)
(2)参考上述证法,对你的结论加以证明;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03858c5f3aef6ff80609692d4e4f6fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1244e50a8246eb77b35b19007fbb443.png)
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名校
解题方法
3 . (1)当
取什么值时,不等式
对一切实数
都成立?
(2)若实数
,
,
满足
,则称
比
远离
.对任意两个不相等的实数
,
,证明
比
远离
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6d03dfc5b4ce38e17403b3b49fdc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d41b744a89e1a50c96ca75bf090830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b0bcc077bc78b7aae05b0c9dff42b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3f034eb004e6db6c58a3bcd7d18cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
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4 . (1)已知
,
,
,求证:
;
(2)当
时,不等式
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2129e8ec4f374ae282fb9785461a64c7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30ce13f0555c28c8bfc435b1a640a8.png)
您最近一年使用:0次
名校
解题方法
5 . 已知函数
为奇函数.
(1)求
,判断
的单调性,并用定义证明;
(2)若不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ca09548bb2ade976e4db708ff209c4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2a56a3dbc9d402e33f172d90694b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2024-02-18更新
|
345次组卷
|
4卷引用:山东省临沂市2023-2024学年高一上学期期末学科素养水平监测数学试题
解题方法
6 . 若
,对任意正数
,不等式
恒成立.
(1)求实数k的取值范围.
(2)若k取最小值,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d486216b7345d17184da44bdebe784f6.png)
(1)求实数k的取值范围.
(2)若k取最小值,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48325f732c8ba723f3b5dc30e1eb9c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0703ac5a9ee9d198efa0a5005e183850.png)
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7 . 已知函数
,
.
(1)若
,
,求
,
的最小值;
(2)若
恒成立,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac18d45cf62862e456a5757bd81f6cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cc01dd0de04563061deb6c90fdce8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026694a3e840b4e1d706e70f4ed4d0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50ac258ef199b8d5bea76b095301ba3.png)
您最近一年使用:0次
名校
解题方法
8 . 已知定义域为
的函数
是奇函数.
(1)求
的值;
(2)直接写出该函数在定义域中的单调性(不需要证明),若对于任意
,不等式
恒成立,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc01c3488e3a86c0396ebd2e474bfdc0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15bd315b801f71bc30b8d772098614.png)
(2)直接写出该函数在定义域中的单调性(不需要证明),若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51159984b2cb00f30b3986315019623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2bc80e285d1952af5e2406b37802fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
9 .
是定义在
上的函数,满足以下性质:①
、
,都有
,②当
时,
.
(1)判断
的单调性并加以证明;
(2)不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6593a700bf3e89107556454666b787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cccdff49c3efe6e7a7dbbf69db9319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c6f119137e1b6760d55956d99d963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb748f46b482135cc44963250860abd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2023-11-16更新
|
363次组卷
|
5卷引用:浙江省“七彩阳光”新高考研究联盟2023-2024学年高一上学期期中检测数学试题
浙江省“七彩阳光”新高考研究联盟2023-2024学年高一上学期期中检测数学试题 (已下线)第五章 函数的概念、性质及应用(单元重点综合测试)-单元速记·巧练(沪教版2020必修第一册)(已下线)单元高难问题03函数恒成立问题和存在性问题-【倍速学习法】(沪教版2020必修第一册)(已下线)专题04 函数的性质与应用2-期末复习重难培优与单元检测(人教A版2019)安徽省合肥市第六中学2023-2024学年高一上学期12月月考数学试题
名校
解题方法
10 . 已知函数
,
.
(1)若
,
,求
,
的最小值;
(2)若
恒成立,
(i)求证:
;
(ii)若
,且
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac18d45cf62862e456a5757bd81f6cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cc01dd0de04563061deb6c90fdce8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026694a3e840b4e1d706e70f4ed4d0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50ac258ef199b8d5bea76b095301ba3.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a815c292c17e3c59d9c5c663f7370b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2023-09-25更新
|
145次组卷
|
2卷引用:广东省茂名市信宜市第二中学2022-2023学年高一上学期期中数学试题