名校
解题方法
1 . 已知二次函数
.
(1)若
的解集为
,解关于x的不等式
;
(2)若对任意
,
,
且不等式
恒成立,并且存在
,使得
成立,求
的最小值.
(3)若对任意
,若
且不等式
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc04e3464f8753d15524ca4e3eb6cc89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b03f81246769936154d50d832366d.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851eae00e3369068e33a7e6420483883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3177f577e0cd5f81eb0d20470d744bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc65d6eb9b63f96d80b54ec9893aee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc00c0f2becd765d5a37188e3c9ffc6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499c23688b5db527fddf98214e538a12.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851eae00e3369068e33a7e6420483883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc65d6eb9b63f96d80b54ec9893aee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15d40a6f559b5d1c71216768c10445f.png)
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2022-10-12更新
|
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3卷引用:辽宁省沈阳市第二中学2022-2023学年高一上学期第一次月考数学试题
解题方法
2 . 某天数学课上,你突然惊醒,发现黑板上有如下内容:例:求函数
的最小值.解:利用基本不等式
,
,可得
,于是
,当且仅当
时,取得最小值
.
提示:基本不等式
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d9c7e2c4ee014b70770fd0bf2e3c8a.png)
(1)老师请你模仿例题,研究函数
的最小值;
(2)求函数
的最小值;
(3)当
时,求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fbe8ac70f19dc1936e28ec2340ec00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5fefd272c9f61202e1b86b2f218cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f7894c40057d06178c8bd66d465ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4cf6e09ed07cf63be5a4b053501874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f5dc4d1385583673b07565f8712879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
提示:基本不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31de21495e62c1f3ecd15d9bfb76eb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d9c7e2c4ee014b70770fd0bf2e3c8a.png)
(1)老师请你模仿例题,研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7d324f0dac2e545419309d0ee45076.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e9f68b844931a0b9b0cd4344a6b569.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552bf49ac6cf271a8c19610afaa8ed97.png)
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名校
解题方法
3 . 二次函数
满足
,且
有唯一实数解.
(1)求
的解析式;
(2)若
且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b3e4e9e74fb4ce9b3d96cd4a504035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e44284cb19805a584880a686ac3df9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1aca2284a6d8ce3e50d0f300a571b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9ba50ede8ef97b843accf839fef5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
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2023-11-09更新
|
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2卷引用:河南省商丘市名校2023-2024学年高一上学期期中联考数学试题
名校
4 . 已知方程
的解为1,3.
(1)求实数a,b的值;
(2)若
,
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08efc2ab6d8db0af549778e76fe57f2.png)
(1)求实数a,b的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e064f16b70fb7e526bb6aba496202d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e62ba44cbfec6823ebc1f0c7457fb.png)
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2023-10-22更新
|
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6卷引用:河北省保定市第三中学2023-2024学年高一上学期10月月考数学试题
河北省保定市第三中学2023-2024学年高一上学期10月月考数学试题山西省临汾市洪洞县向明中学2023-2024学年高一上学期10月月考数学试题(B卷)河北省承德市双滦区实验中学2023-2024学年高一上学期期中数学试题(已下线)2.2基本不等式【第二练】山东省菏泽市菏泽一中南京路校区2024届高三艺术生上学期1月月考数学试题(已下线)考点8 一元二次方程、不等式 --2024届高考数学考点总动员【练】
名校
解题方法
5 . 解下列问题:
(1)已知
,
,且
,求
的最大值;
(2)已知
,求函数
的最大值;
(3)若正数
,
满足
,求
的最小值.
(1)已知
![](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/d676a58fa4d7c4e8985b85c033495c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3697ec54c1e6516bb71f5b2431d1870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcb6ea431bc38718c156d3866f83bf1.png)
(3)若正数
![](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/d57df333b2783a9d7eacfa8cf6c81c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3836619ba47499fca6df4e5182da9d.png)
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|
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