已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1c6a05cb9756dd7e2423b31d587064.png)
(1)求函数
在点
处的切线方程;
(2)若
存在极小值点
与极大值点
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1c6a05cb9756dd7e2423b31d587064.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.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/3eb06ea07acaf75e459dbc1d53477391.png)
19-20高三·广东广州·阶段练习 查看更多[4]
广东省广州市广东实验中学2019-2020学年高三第三次阶段考试文科数学试题河北省石家庄市第二中学2022届高三下学期3月月考数学试题河北省廊坊市第一中学2023届高三上学期11月月考数学试题(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:2019-12-23 16:21:14
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解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】已知
,
.
(Ⅰ)设曲线
在点
处的切线为
,若
,求直线
斜率的取值范围;
(Ⅱ)若不等式
对
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af079e1c79c4f240b3b50a19e8d3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(Ⅰ)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e560b5246bb13e0e6bc15a5913eb879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f69461577a8ae9e496ad97e1e665b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75be174d2d2658a6a90a5f3a55a8dfaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
,其中
.
(1)当
时,求曲线
在点
处的切线方程;
(2)讨论函数
的极值点的个数,并分别指出极大值点的个数和极小值点的个数;
(3)若函数
有两个极值点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9b25b8d164e184b7d2d48e8ac8c04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bc584ad930b670e2e46cf1173d4995.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1d87d18f06a801a06d1b9bcaad420f.png)
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解答题-证明题
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(0.15)
【推荐3】已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)证明:当
时,
有且只有一个零点;
(3)若
在区间
各恰有一个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d2345aac6817314e2f7c3d786b79f1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62be04c7b2b2744afea6e0c28ecc67f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
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解题方法
【推荐1】帕德近似是法国数学家亨利.帕德发明的用有理多项式近似特定函数的方法.给定两个正整数
,函数
在
处的
阶帕德近似定义为:
,且满足:
,
.(注:
为
的导数)已知
在
处的
阶帕德近似为
.
(1)求实数
的值;
(2)比较
与
的大小;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16563cfb206d0394cac2a0c2595dda6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5aafa80443bb1bf55659966bb030b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4573475f70860a3d99b92a329d0d07f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a48b674555390d3d52b5dca1b8efaae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea7fa65b493fc1bdf84e16d39ae07d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dd621776dee688a0175a1abe39c258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40765d09390381658d5b4dc0160366cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043b64b1ead1450d67a720cf18328ce4.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966dfe9109671c587892bd32f0b6699.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f589e92d29e40d559a9cb548829662c3.png)
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【推荐2】已知函数f(x)=lnx﹣tx+t.
(1)讨论f(x)的单调性;
(2)当t=2时,方程f(x)=m﹣ax恰有两个不相等的实数根x1,x2,证明:
.
(1)讨论f(x)的单调性;
(2)当t=2时,方程f(x)=m﹣ax恰有两个不相等的实数根x1,x2,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186264a5a4c47b79108c6beb26093af0.png)
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【推荐1】已知函数
.
(Ⅰ)讨论函数
的单调性;
(Ⅱ)若函数
有两个零点
,
(ⅰ)求a的范围;
(ⅱ)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575eaafd1bebccfd6b10b71a9814c658.png)
(Ⅰ)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(ⅰ)求a的范围;
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5120da38792c0c52a5f54cc7912e290f.png)
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【推荐2】已知函数
,
,
.
(1)求
在
的单调性;
(2)若
,试讨论
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b454b32cadad13baa8169c13b3c5fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e436b9a4b5ca59138de988bd0a19637e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d165b3397aab477869842a16b7ff6aa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3f81841df5843d6058e09161bb9c21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3d6f08a6657d41a177a7c5e246e6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐1】已知函数
.
(1)当
时,
,求
的取值范围;
(2)函数
有两个不同的极值点
(其中
),证明:
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6268f2fe0dc41d2f6f9931e465ef4cab.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636289ad84b4a3a51095dd32ca201f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e895d73fc0b144b0245e730c397391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef92ee798393ea59d0d9a73a8272809.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b02c07f3b1fd2ce2218985bacdd0b86.png)
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【推荐2】已知
(其中
为自然对数的底数).
(1)当
时,求曲线
在点
处的切线方程,
(2)当
时,判断
是否存在极值,并说明理由;
(3)
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd0fc9870cc9df9dd9af2ac6c25055f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49aadc3bac0a86a85b786dcbc1461b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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