已知函数
,
.
(1)若函数
是
上的增函数求
的取值范围;
(2)若函数
恰有两个不等的极值点
、
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad911eb0e3862f9f6fd98a59ecd7333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f7f23e7f20dd8bc65a4967cd306782.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2628e2dd7a988cc80530e739c22b2280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82225c816ad73ebb88e515e88e8005a5.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/9e8b8bceaf40b50b078a76793310856f.png)
2022高三·全国·专题练习 查看更多[1]
(已下线)专题6 极值点偏移问题
更新时间:2022-12-16 22:02:33
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解答题-证明题
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较难
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【推荐1】已知函数
.
(Ⅰ)若函数
在
上单调递增,求实数
的取值范围;
(Ⅱ)设
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f5e01c96aab191d2519c97debb7931.png)
(Ⅰ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b5e402f725a71c3305bf3e72f72ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0aad326f4ef0ed944171c74d1a0c36.png)
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【推荐2】已知函数
(a为常数).
(1)若函数
在定义域上单调递增,求a的取值范围;
(2)若
存在两个极值点
,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e0256b8614c7d6edc417a6cb1038d.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36e45a1170cdfe1b3216d453c39f974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f502d481e21d1288fde70a18e3ee451.png)
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【推荐3】已知函数
,
.
(1)当
时,求函数
的极值;
(2)若任意
、
且
,都有
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5e48cfc740e960393b0395573298d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83c61f388e1960c7e2d6e5877586e00.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12165378c124c0a17ed6b7dbe253412c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a253e52444028a5e33daa0cd3b566e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
,其中
.
(1)当
时,求
的极值;
(2)讨论函数
的单调性;
(3)对任意
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91c7a3b247cb2ec577d4cea3158e717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f7f23e7f20dd8bc65a4967cd306782.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be8c7ae5b03e7e7f5659b38838b3116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52ebd68b3123ba2f0a5848653ee5aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
.(其中
为自然对数的底数)
(1)若
恒成立,求
的最大值;
(2)设
,若
存在唯一的零点,且对满足条件的
不等式
恒成立,求实数
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87b4c2ad96628e67ef21d9ceae03a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f422d25cce8b6b1275f1387f0e2c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f53acc676c43c13aa47dcc3e2719b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630c2fae97f246c16f1db310b1ddf9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐3】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569ff6208a1c81a3bfba3f59fae3a8e5.png)
(1)当
时,求函数
的单调区间;
(2)令
,其图象上任意一点
处切线的斜率
恒成立,求实数
的取值范围.
(3)当
时,方程
在区间
内有唯一实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569ff6208a1c81a3bfba3f59fae3a8e5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa3dc4e22ccb7a22bc255aa53a4881b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3348348fffffca829e5cce19d50b0126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf0d139c9810361b4971904a943856b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fbbb9c4b0f7937c003ef2c218c02a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0953444691256f713639f4ded91ff306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c34d2e40ee0263ecd6b6737c47bf98a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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