设函数
,其中
.
(1)若函数
在
处有极小值
,求
的值;
(2)若
,设
,求证:当
时,
;
(3)若
,对于给定
,其中
,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b7d03ea4e90568c256de67cb4dc327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127e88c3aa14648770487a295909cf95.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a198944c430230661eea767c6bd7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ff2912fd8d93b6e692936d95b727c5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c34b9e054b33f5d43986e3876a13ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e781a085674b519077d9caf085424f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5fdaf40c6270adb8f5b08a20a0f798.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67abcd075710814b8858bf7b210b4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f542e6e69af89fbe4ec83ecf80566d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e661b1fae296a7ce1ebb7d5722da5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdea14568ebb6f40c464a0b55184fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2017-08-07 09:43:40
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知函数
在区间
上的最大值为
,最小值为
.设函数
,求函数
的解析式,并求
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240e93950267635dee9b234e0d36224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c169d211feb90112d105fcaf042d7b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714a3a95ceddb508866148aeaad1d294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
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名校
解题方法
【推荐2】已知函数
(a为实常数).
(1)若
,设
在区间
的最小值为
,求
的表达式:
(2)设
,若函数
在区间
上是增函数,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0e152bc5b72123ba741de622a5767c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e33c82654651914db2b5d37568e1af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3109a3db9931922fda8851ab5875b915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e33c82654651914db2b5d37568e1af6.png)
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【推荐3】已知函数
,
.
(1)当
时,求函数
最大值的表达式
;
(2)若
对于任意的
恒成立,求实数
的取值范围:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f9d0e54452c83ea8f78af0c608eb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd797ed5a5b952e2168de7e733633b9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0db2cae2e4d9c51adb60fe0a4da5caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ccc99093ff159b3f94de7033dadde16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.4)
解题方法
【推荐1】已知函数
,
,
为实数)有极值,且在
处的切线与直线
平行.
(1)求实数
的取值范围;
(2)是否存在实数
,使得函数
的极小值为1,若存在,求出实数
的值;若不存在,请说明理由;
(3)设
,令
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bf098ac75b333867022120bea65105.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/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28a3c5f7e2a8773a4d6f924c1628571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e82c4003d20b36777f7aea584e3dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea044493a7e8940d282d41c4d77f6a0.png)
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名校
【推荐2】已知
.
(1)若函数
在区间
上有极值,求实数
的取值范围;
(2)若关于
的方程
有实数解,求实数
的取值范围;
(3)当
,
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5220c1d29955df47343122a463c46a92.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b6bec0e5c57dc0c97d2581012d2c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cf6b77ccc80b271e6b41231c740da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e6a4a1d228a9eec9db8080bef34231.png)
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【推荐1】定义在
上的函数
,如果满足:对任意
,存在常数
,都有
成立,则称
是
上的有界函数,其中
称为函数
的上界.
(1)设
,判断
在
上是否为有界函数,若是,请说明理由,并写出
的所有上界
的集合;若不是,也请说明理由;
(2)若函数
在
上是以
为上界的有界函数,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02cab1add26335b3cb43d5b54c7c853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3bf4a061df1b809e76b7b958542d094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d1a15a360fb1f18366a7a6a34e7833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382140af170f4dd36c1f0b0bb05fb156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f2ef5bd646dc09f315df822244d059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05045be5b0a663fb091a197d51b9c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
解题方法
【推荐2】已知函数
在
是增函数,
在
为减函数.
(1)求
,
的表达式;
(2)求证:当
时,方程
有唯一解;
(3)当
时,若
在
内恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddc1a9a2dfbdaccfaf09cde287e9d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ccd4cc59b47ae583ac3368499685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c9a670bb7d49aa20e23c1c26ee3ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f99bddac58806e0024a1268378fe53d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fde71807463dbdfd8fce1655a5a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162797a27de24bbed68cf2199a5ad1c1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f634ee27355db9fb1a915c626232ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81440b88ac96bfae5c6fa3c487e05862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f034f7c275de68eaef93012d1fa92d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】已知数列
满足,
.
(1)求证:
;
(2)求证:
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c216de44cb0c30ffddfbf2555cfc522c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e08f70737c8f10caab2dbc8795a04f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19759afbac3208f15cc3f752e298daa1.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64616323e54948d5041a57eb008ce6e.png)
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【推荐2】已知二次函数
,且
时,
.
(I)若
,求实数
的取值范围;
(II)
的最大值;
(III)求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a6bea084567e3055f0e58499398a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366839b25310cb3168d411b1d5f73b06.png)
(I)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8066f8ed959c1316358fcbf802b7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(II)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3697b04b4b7bdd6c42b62b0ae7b6c3dc.png)
(III)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e020de76853a6fa9b9e3f41d84c42d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d397a6e7abac0ad425289a017e4f07.png)
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