已知函数
,
为
的导函数.
(1)证明:当
时,函数
在区
内存在唯一的极值点
,
;
(2)若
在
上单调递减,求整数a的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ef630475de3509e3d19c4963a74242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d126b5824164e145c4764ad0b79396a8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ff8dca35b759d3051b62badd7d76bc.png)
2022·全国·模拟预测 查看更多[3]
2022届东北三省三校(哈尔滨师大附中、东北师大附中、辽宁省实验中学)高三第四次模拟联考理科数学试题(已下线)专题10 利用导数解决一类整数问题(已下线)4.3 利用导数求极值最值(精讲)-【一隅三反】2023年高考数学一轮复习(提升版)(新高考地区专用)
更新时间:2022-05-31 22:20:51
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解答题-问答题
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困难
(0.15)
【推荐1】设函数
,其中
是自然常数.
(1)总存在两条直线与曲线
和
都相切,求
的取值范围;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749e2d768465615881518cf54b25a4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab625f9a61f620b0c59920729c52c37.png)
(1)总存在两条直线与曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a06e5bb73f137819915034ba9bc961bc.png)
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解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知函数
,
.
(1)当
时,求函数
的最小值;
(2)当
时,若关于
的不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4c85ce75b861498ff03db1bfadc317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/517386df43184beafbdd74d1b6059e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题
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困难
(0.15)
【推荐3】已知
.
(1)讨论函数
的单调性;
(2)若函数
有且仅有一个极值点,求函数
的最小值;
(3)证明:
(
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a513e5c148275034a661d1d88fc2a60d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdff7ccc5e56c68d329fd4dba2d8fab.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8320d32971349bff7eba11c2b35f112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
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解答题-证明题
|
困难
(0.15)
【推荐1】已知函数
.
(1)若
无极值,求
的取值范围;
(2)若关于
的方程
有2个不同的实数根
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea299b940d5bbf495796ec5ba557ac6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/fbeb950b11982f0cf5cbd381558cc4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3892366c41364a7b93e614123171d450.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】已知函数
.
(1)讨论函数
的单调性.
(2)已知
有两个不同的零点
、
.
(ⅰ)求实数
的取值范围;
(ⅱ)求证:
(
为
的导函数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce670a04d3da03e73059c53629cf0b2.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](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)
(ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33af2475e854827fcb2cfcee9a98b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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