1 . 已知函数
,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e863ea4f1e8af63d06ad88a235a48f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba934874cc9f2ab272fdff67ea23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d05399ef814325fd8c5a86e52e0bb0.png)
您最近一年使用:0次
2 . (1)已知
求函数
最小值,并求出最小值时
的值;
(2)问题:正数
满足
,求
的最小值.其中一种解法是:
,当且仅当
且
时,即
且
时取等号.学习上述解法并解决下列问题:若实数
满足
,试比较
和
的大小,并指明等号成立的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27d34123f3dcdf9db269c0d1e9d7802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893acd5e191b6fee8e6cc70afb4a0091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)问题:正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57f879f6e8df7d5fb261328806260b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca07c22ee28e662b8cea8d96f3f7027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c34bb88b7df81b0a9cc4f5f532f529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86c800af77b70d7799500a45f91721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddab9f2cdfbb37f5d5845e7943910624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edfccf9159bb4010669e938f788149b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09ffc1644c7029219b88232145abbdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e32a3a39e310fe224a979e0cafce49.png)
您最近一年使用:0次
名校
解题方法
3 . 已知
,
,函数
的最小值为
,证明:
(1)
;
(2)
.
![](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/9b99336431416ded28a3e971d6ddd484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212711ed49c8b9fc0ea8310f2c5b88ee.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233a25c0b577e15ba1e73fe3eb1490d2.png)
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4 . 已知数列
和
,设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f56e14765e0275bd98aedd8f021975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638baab21fc1218c89671cb871af4648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f926978fad9cdc89916a5272479d17.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2023·全国·模拟预测
5 . 已知x,y,
.
(1)若
,证明:
;
(2)若
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588e4cf838add469512e328d2e60916b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fb952f9a33887a3f80b04e1e5e6134.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd24c686fbaaa68705d654b880481ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeadd667059ca5e53125d3c0cda85bae.png)
您最近一年使用:0次
解题方法
6 . 已知数列
满足
,
.
(1)求数列
的通项公式;
(2)求证:对任意的
,都有
①
;
②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632b40493c7d0bfc7b2ea7a95e45c0a9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aec66251e93fca63dab14b9656415be.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3b0297eb58d0795efc566a5a823215.png)
您最近一年使用:0次
名校
7 . 已知定义在
上的函数
,且
恒成立
(1)求实数
的值;
(2)若
,且
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b5070ce370431d6701e17eaaee0d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f0784ce7148d8fed3dee5c508eae05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0538b39e703cc71355da6cfc5faea4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d61d98c3d75e65b45f98b9f41da38.png)
您最近一年使用:0次
2019-09-12更新
|
747次组卷
|
5卷引用:宁夏银川一中2018-2019学年高二下学期期末考试数学(文)试题
解题方法
8 . 已知函数
.对任意
,且
,求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4201725a144562cc0f0da070603308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85db25f0623bb097e5a57117df267011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3ecbbaca8eeb1cfa8f4035f7d5726.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400f3350d356149043b4590e2b4c8138.png)
您最近一年使用:0次
2018高二下·全国·专题练习
名校
9 . 已知在
中,角
,
,
所对的边分别为
,
,
.
(1)证明:
;
(2)若
,且
恒成立,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.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)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eba94e4ac26a70c1aefd4743757583b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce83158de5c550cdfa53f86dd06a7bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a3155da1d664ea682be569a463c1e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2018-05-17更新
|
1044次组卷
|
5卷引用:2018年5月13日 每周一测——《每日一题》2017-2018学年高二文科数学人教选修4-5
(已下线)2018年5月13日 每周一测——《每日一题》2017-2018学年高二文科数学人教选修4-5(已下线)2018年6月3日 每周一测——《每日一题》2017-2018学年高二理科数学人教选修4-4+选修4-5(已下线)2019年4月28日 《每日一题》文数选修4-5-每周一测四川省成都市锦江区嘉祥外国语高级中学2022-2023学年高三上学期期中数学理科试题四川省成都市锦江区锦江区嘉祥外国语高级中学2022-2023学年高三上学期期中数学试题
名校
解题方法
10 . 已知函数
,若不等式
对任意实数
恒成立,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835c12d1a6fe4475aebce2897658f8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db62529dc40e1078a0625b3a129f0a32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18419ab2d7cde42b1130e9894dc5b9e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-02-22更新
|
2677次组卷
|
4卷引用:2017届四川省资阳市高三上学期期末考试数学(文)试卷