设函数
,
.
(1)已知
对任意
恒成立,求实数
的取值范围;
(2)已知直线
与曲线
、
分别切于点
、
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270bb08b90f72d5671ab8225f356c43.png)
①求证:
;
②已知
对任意
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdad8acb5f4d31bfee990bf844b1a37.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae38ca67273215ea01f8eec6bdd53e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27c0ab3e2d7698f082854bafe4174dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4197070db34f0419b6d85eed4cec9fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270bb08b90f72d5671ab8225f356c43.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f61bb43900bfc8bf7760185b4e0bbb.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9268d9bfd0e22baf5956a2d6fb07ed6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153c6af699ce31b283e79b973e1927af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2024-03-07 17:54:06
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【推荐1】已知函数
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(2)若对
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(3)已知
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(1)如果曲线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d41d398944a02f613784ff1ceeaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089a407016a48bd18f7ccb79355e8f1a.png)
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(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
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名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83d55bbc1e9eb4ee895ce58c275d73.png)
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(2)若函数
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的图象交于S、T点,以S点为切点作
以T为切点作
的切线
,是否存在实数m,使得
?如果存在,求出m的值;如果不存在,请说明理由.
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解题方法
【推荐1】已知函数
.
(1)求函数
的极值;
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有两个不同的零点
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(1)求函数
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6773c8b9baffb07b866016fe9c3fa1f2.png)
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【推荐2】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1465d0658f948e19c06ec1efcb0767b4.png)
.
(1)当
时,求函数
的最小值;
(2)证明:对
x1,x2∈R+,都有
;
(3)若
,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba60f4599d2186a615ebad59f9a85eb8.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1465d0658f948e19c06ec1efcb0767b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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(2)证明:对
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(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a0700a41b28c19eb66798d54c3248d.png)
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较难
(0.4)
名校
【推荐1】已知函数
.
(1)当
时,求证:
;
(2)当
时,若不等式
恒成立,求实数
的取值范围;
(3)若
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41f0a059d02f88033d4c46fbe648ba2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e2d7a7b5ef6de479ac02b04965245d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a154aa77357cb73cbcd37275d873a324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e2d7a7b5ef6de479ac02b04965245d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9c89d2cd1fb46b1e71ad10227c098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a375205425cf8092535bcc485646fdc3.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】已知
,
.
(1)求函数
的增区间;
(2)若函数
有两个零点,求实数
的取值范围,并说明理由;
(3)设正实数
,
满足,当
时,求证:对任意的两个正实数
,
总有
.
(参考求导公式:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa8454a7f8cf084dad8f25bf67588e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求函数
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(2)若函数
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(3)设正实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.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/8db679b09eaa066b7a48a1452b17dade.png)
(参考求导公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cce9b118a50f0a0b747f110e86aa948.png)
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