已知函数
,且
.
(1)求实数
的值;
(2)求证:
存在唯一的极小值点
,且
;
(3)设
,
.对
,
恒成立,求实数b的取值范围.
(参考结论:当
时,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96567573b7e2f9bd03b2d0eb8fc3c730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d62cfb02407e96c95517cabba388c2.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6490bd98262496ffe0ceb2a9403157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1e204aab8e78bb9554d4885b03c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a6aa1bde1a4383fa97233b91bbca3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61036a6d25bee77eea6829e36e149254.png)
(参考结论:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b690b7833c846bbe1980342a696441b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5dd77a803a3072158a37fd9db56eb2.png)
2023高三·全国·专题练习 查看更多[1]
(已下线)第九章 导数与三角函数的联袂 专题四 利用导数证明含三角函数的不等式 微点3 利用导数证明含三角函数的不等式(三)
更新时间:2023-11-12 11:50:25
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知函数
的极大值为
,其中
为自然对数的底数.
(1)求实数
的值;
(2)若函数
,对任意
,
恒成立.
(i)求实数
的取值范围;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc3ade381cfe8ef06c8f810f80ed950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aec772d364c0c94a61d6f4bed9d086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef74e4495ef82ce7ffdaf4b286769b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a902c3897d3b801501fe3a85a7c29a.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3173b8ea513ab77bc1e75dfac67eda7e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】设函数
.
(1)当
时,求
的极值;
(2)当
时,讨论
的单调性;
(3)在(1)条件下,若对任意
,有
恒成立,求m的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc037a7e332049e25721554ad2758cd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)在(1)条件下,若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfd71dff59b3659fefb9818d6609c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b569ce65d8ed9391897ce5231f87329a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】(理科)已知函数
(
).
(1)当
时,求曲线
在点
处的切线方程;
(2)若函数
有两个极值点
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8923affba77d55b330a58dd208d84b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9b5e076078240e0c5ad9763a9824d3.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8d549130c5be01b3cb0c48a8cf260e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】已知函数
.
(1)若该函数在
处的切线与直线
垂直,求
的值;
(2)若函数
在其定义域上有两个极值点
.
①求
的取值范围;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7267cde536e4c0c470185c8b3d862340.png)
(1)若该函数在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9231260a2de7949154b7244bf70785c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5be3af0c67a20bee47063487d305f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3661dbd3b2c578c685e6a11a4102ddd.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】已知函数
.
(1)若
在
处取得极值,求实数
的值.
(2)求函数
的单调区间.
(3)若
在
上没有零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6999e59890ef0a8dc57fbb53f9941acf.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47e734b17201fe992be7775714e9558.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
|
较难
(0.4)
解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70fcdd8438ec1162aae4872ed986b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cfbe7fb754dac637198aa33e05423c.png)
(1)讨论函数
的极值点个数;
(2)设函数
,若对
,
恒成立,且
有唯一的零点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70fcdd8438ec1162aae4872ed986b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cfbe7fb754dac637198aa33e05423c.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58a2ddbd7fddf0e67957a6ee60b391e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf04f070224d193aaa2d0b13b96d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】已知
.
(1)求
的极大值点;
(2)若
,当
时,
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2abd52a21627a3233cd377aa1a257189.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1e123a2b615be0baeef83bd218bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda86339539ec8db5f3b00093ac36393.png)
您最近一年使用:0次