1 . 已知函数
(
为常数,
).
(1)求函数
的零点个数;
(2)已知实数
、
、
为函数
的三个不同零点.
①如果
,
,求证
;
②如果
,且
、
、
成等差数列,请求出
、
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0c8686d4cd6fd08b0a8214b94523e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36b234ba460321e811de1729eadd4b6.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知实数
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a410c1e7bf7ba96d2c1f35ef2e99af29.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b73abfe4bc26b1ded680d7abb1a2cac.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/071a7e733d466949ac935b4b8ee8d183.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/071a7e733d466949ac935b4b8ee8d183.png)
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2 . 已知
,若函数
有两个零点
,
有两个零点
,则下列选项正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82b212ffece98b7918f74d67de4e4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd0f5198eb971b37b0d29a00acfdd55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca31577dd76afbc1b720cdcad88ffd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4990f8e4673b60c8449a66b40f6519a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-06-09更新
|
739次组卷
|
7卷引用:考点25 不等关系与不等关系-备战2022年高考数学(文)一轮复习考点帮
(已下线)考点25 不等关系与不等关系-备战2022年高考数学(文)一轮复习考点帮(已下线)专题2.20 函数与方程-重难点题型精练-2022年高考数学一轮复习举一反三系列(新高考地区专用)(已下线)专题3.8 函数与方程(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)专题4 函数图象与方程-学会解题之高三数学321训练体系【2022版】江苏省泰州市2021届高三下学期考前练笔数学试题江苏省盐城市上冈高级中学2021-2022学年高三(实验班)上学期第一次学情检测数学试题福建省厦门外国语学校2021-2022学年高一10月第一次月考数学试题
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3 . 如图,正方形的边长为
,请利用
,写出一个简练优美的含有a,b的不等式为______ ,其中“=”成立的条件为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0319534e78ec7047c50cf23ba3b34be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee84a005c4c883b4dbd0e0dfd703cba3.png)
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2023-07-24更新
|
190次组卷
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4卷引用:模块四 专题2 题型突破篇 小题进阶提升练(3)
(已下线)模块四 专题2 题型突破篇 小题进阶提升练(3)陕西省洛南中学2022-2023学年高一上学期期中数学试题山东省鄄城县第一中学2023-2024学年高一上学期9月月考数学试题福建省莆田市第三中学2023-2024学年高一上学期十月月考数学试题
名校
4 . 均值不等式
可以推广成均值不等式链,在不等式证明和求最值中有广泛的应用,具体为:
.
(1)证明不等式
.
(2)上面给出的均值不等式链是二元形式,其中
指的是两个正数的平方平均数不小它们的算数平均数,类比这个不等式给出对应的三元形式,即三个正数的平方平均数不小于它们的算数平均数,并尝试用分析法证明猜想.(
个数的平方平均数为
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72dc44cb9d5684d5377141fcd393c415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ece659f1e648942b5c9f7155685dcc.png)
(1)证明不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b40495f9b82c312c90382cb0a1b75f.png)
(2)上面给出的均值不等式链是二元形式,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7806d740bdb93071c7580a9c6db0d09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40a7ac954477ada360785f8fe82a162.png)
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21-22高一·湖南·课后作业
解题方法
5 . 证明不等式:
(1)若
,
,
,
都是正数,求证:
;
(2)若
,
,
是非负实数,则
;
(3)若
,
是非负实数,则
;
(4)若
,
,则
.
(1)若
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e7387a3fbab6508695365955f55258.png)
(2)若
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d92a6b95fdfdedb405447340293bdc.png)
(3)若
![](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/727ff3ac24b506706045956c16336f94.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19339e3904e9541ff26b30ae5f1242b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f58b9bc974b789928f6490acb43fb3.png)
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解题方法
6 . 已知函数
在
上单调递减.
(1)求实数
的取值范围;
(2)当实数
取最大值时,方程
恰有二解,求实数
的取值范围;
(3)若
,求证:
.(注:
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b8744c94d54246ce023e8a88b998c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d303edb2b74f0152e9da9e0b77a1ca37.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f826c4322fdbf0838670d917f7735e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86f9b0f357d6166ebc79012bf88706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55278cd8cbc74b25a26141e20fe78e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9003a22f3bfbdc2dba7869c0f7d54c8c.png)
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
7 . (1)已知
,比较
与
的大小,试将其推广至一般性结论并证明;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7484d9b1e33ed553e44955bf41730c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d2278151be65f6aea061e897c39975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6c44cc2b5c4dc6d062db0e45c9eb4.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41029967073b4987a23e89b379f23758.png)
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解题方法
8 . 已知关于
的方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38abfe94aab2620c3f39e483615dfbf5.png)
有两个实根
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
,则下列不等式中正确的有______ .(填写所有正确结论的序号)
①
; ②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d991bd47bd0825b3a84f5d635ee5f9dc.png)
③
; ④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38abfe94aab2620c3f39e483615dfbf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cea72e0c37257bcfd85a59ef8dd0f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ce41c1548ce8cfb04284ad9768878a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6175a72db472feeed10e44fd8df3fc70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d991bd47bd0825b3a84f5d635ee5f9dc.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6566566211b4627a3e2447c3d126ce7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a00ea29ab2851b2b9585cb0a3225e560.png)
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2021-09-11更新
|
464次组卷
|
4卷引用:专题17 不等式-备战2022年高考数学学霸纠错(全国通用)
(已下线)专题17 不等式-备战2022年高考数学学霸纠错(全国通用)(已下线)考向22不等式性质与基本不等式(重点) - 2河南省大联考2021-2022学年高三上学期阶段性测试(一)文科数学试题河南省十所名校2021-2022学年高三上学期文科数学阶段性测试(一)
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9 . 受亚洲飞人苏炳添勇夺东京奥运百米决赛第四并破亚洲记录的影响,甲、乙、丙三名短跑运动员同时参加了一次百米赛跑,所用时间分别为
,
,
.甲有一半的时间以速度
米/秒奔跑,另一半的时间以速度
米/秒奔跑;乙全程以速度
米/秒奔跑;丙有一半的路程以速度
米/秒奔跑,另一半的路程以速度
米/秒奔跑.其中
,
.则下列结论中一定成立的是()
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155c5f3a5c55e0c95191c5a893f63062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4109d38a447a8925a10cf442752f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1dcd75e97ee60339d6c4831796d5e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21242ae7ab734ea9678948abb188dc4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2022-02-14更新
|
255次组卷
|
4卷引用:第06讲 基本不等式(8大考点)(3)
10 . 在均值不等式中,令
,
,则得到的对应结论为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32773797e976aa0e3c2cc535cc40d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed6bb2c30eadad55676c91f56c552df.png)
A.如果![]() ![]() ![]() ![]() |
B.如果![]() ![]() ![]() ![]() |
C.如果![]() ![]() ![]() ![]() |
D.如果![]() ![]() ![]() ![]() |
您最近一年使用:0次