已知函数
,
.
(1)当
时,求
的值域;
(2)讨论
极值点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e1a154a1d3b9ed8ed7e1257446a346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
更新时间:2021-11-24 08:53:30
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【推荐1】已知函数
.
(1)讨论
的单调性;
(2)设
,若
,且对任意
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3875e643fd4c000d70155483e6c15ffa.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9d4264699a46519760c2cc90f01109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb7a27be6aa61cfd14fb0642e49fe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知函数
.
(1)设
为
的导函数,求
在
上的最小值;
(2)令
,证明:当
时,在
上
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b1cb4b9b48ba6ba1784d270dbe179c.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdfed8d6862125dc1fecfce0322a750.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a5f6a592d7d92026b43f6b4443bd94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fe2115d883d13561e28006d3f6143b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6a74d70800d0df45d6f7266c42ac2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0527a896aec4a245945e5edee00deed.png)
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【推荐1】已知函数
.
(1)若
的图像恒在
轴下方,求实数
的取值范围;
(2)若函数
有两个零点
、
,且
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dfbebe96106abe60a93fa0a23ad3e9d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da714d34f4275d1cfd33355b0a7ff403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
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【推荐2】已知椭圆
的右焦点为
,直线
被称作为椭圆
的一条准线,点
在椭圆
上(异于椭圆左、右顶点),过点
作直线
与椭圆
相切,且与直线
相交于点
.
(1)求证:
.
(2)若点
在
轴的上方,当
的面积最小时,求直线
的斜率
.
附:多项式因式分解公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533b93dd6eb6b474481247736699c76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d59cd2ec27c04831940ebae905a176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47690c6f046c60b9eeeec77a1186cdcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ca9ea5c24e205bf7e26d1f5aa49fd.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
附:多项式因式分解公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b07d01b6f7c2e5e284999d5c7f11dfe.png)
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【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce09d36c7fbed8ad2bf6eba8f111cfa.png)
(1)若
,求
的最值;
(2)对于任意
,都有
成立,求整数k的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce09d36c7fbed8ad2bf6eba8f111cfa.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2977eb9fa4ec7f1293bcd783ea02220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdf6bb13cf303425b4fc31e4b8ed80c.png)
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【推荐1】函数
的部分图像如图所示.
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670474034626560/2670512082763776/STEM/71cf30c9dd6a48989fed0df083b23562.png?resizew=265)
(1)求
的解析式;
(2)若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d632748350dbfb1138a7754a81623771.png)
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670474034626560/2670512082763776/STEM/71cf30c9dd6a48989fed0df083b23562.png?resizew=265)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cddeb8616380373fe0e0227eb284a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a379603ea8ba254812576f9606f40d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,点A,B单位圆O上的两点,点C是圆O与
轴正半轴的交点,将锐角
的终边OA按逆时针方向旋转
到OB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/aa36e95b-2693-4b1e-abe3-172cd379c488.png?resizew=165)
(1)若点A的坐标为
,求
的值;
(2)若
的面积为
,求锐角
的大小;
(3)用锐角
表示
,并求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/aa36e95b-2693-4b1e-abe3-172cd379c488.png?resizew=165)
(1)若点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfd8da8cf8cfacb41ba262bfe0d77cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94baeb626062a4bdbbae39287f0180e6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)用锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c178c9abab25de6a69a3d5b98c55bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c178c9abab25de6a69a3d5b98c55bc6.png)
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【推荐1】已知函数
为
的导数.
(1)求
在
处的切线方程;
(2)证明:
在区间
存在唯一极大值点;
(3)讨论
零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e249bb1e74995a41281e3886698f26b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a123fb0d1e61514320edce3ca4e4f86.png)
(3)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
【推荐2】已知函数
(
且
,
)恰有一个极大值点和一个极小值点,其中一个是
.
(Ⅰ)求函数
的另一个极值点;
(Ⅱ)求函数
的极大值
和极小值
,并求
时
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db07b7c288543a01ccbe5fef8d4162e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4950cc100c4f08bec9fc33ce6ddedac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c695c8d2f6f3f52502ac57043e3a49e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822c62241dcb6c689cb19a259e33e82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac6588fb98cf8157d3a9363d763a218d.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e116d0c598726d9a505689a2caad0b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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