已知函数
,
为自然对数的底数.
(1)求函数
的极值点;
(2)若对任意
,都有
,求常数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7490181c4b5308c12a745a60ade5ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cefa2c33e9ddf44d8d704a385f8e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-03-16 17:12:26
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解答题-问答题
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解题方法
【推荐1】已知函数
在
上单调递增,函数
.
(1)求
的值;
(2)若存在
,使得
成立,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8cc5e750706dc57f0454e0b2e6e934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2894dfe3ae18d16edc1c96f18adc72f5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cf94a58e714ed5c8de2591020c1b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f265fcac950a454f908870ad864af8.png)
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解题方法
【推荐2】设定义在区间
上的函数
的图象为
,
、
,且
为图象
上的任意一点,
为坐标原点,当实数
满足
时,记向量
,若
恒成立,则称函数
在区间
上可在标准
下线性近似,其中
是一个确定的正数.
(1)设函数
在区间
上可在标准
下线性近似,求
的取值范围;
(2)已知函数
的反函数为
,函数
,(
),点
、
,记直线
的斜率为
,若
,问:是否存在
,使
成立?若存在,求
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d21e8c00e2bbbd848c35e007552b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727424d617d8d0d1e11d4d196aaf9b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b328842f32e6a82679f785acc476a490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9990022c047546f493615fd54cf71984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b58891e1465e384a18d76e6228165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5516c07220cc3d72338230646a351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3083a3f3a1940d55bdfaef87c6046a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d21e8c00e2bbbd848c35e007552b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914a49b0d7aedc593a3e87fbab7c31ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3901ac21c497f1bb6a837d494a5dd8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d147d82428c9a30da4a5c3e333bce5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
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【推荐3】已知函数
.
(1)当
时,求函数
在
处的切线方程;
(2)若函数
在
上恰有两个极值点,且设极大值和极小值分别为
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5671bd9cb7b3966c5705fe64111a9862.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f57a0acb4a6d593572fe2a45f6f5dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
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(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c475b2ea5e9fb1bef54c5c7c34ce18c0.png)
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【推荐1】已知函数
,其中
为自然对数的底数.
(1)当
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在
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(2)当
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恒成立,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e894373cf05caac495a0eec1e428b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
在点
处的切线方程为
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(1)求函数
在
上的单调区间;
(2)当
时,是否存在实数m使得
恒成立,若存在,求实数m的取值集合,若不存在,说明理由(附:
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e858ddf41ebcb28709d081beaab9b6d5.png)
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(1)求函数
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(2)当
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您最近一年使用:0次
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【推荐3】已知函数
.
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a3e78952baa1a6f6e5ee7db76c3a21.png)
(1)当a=-1时,证明:函数
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(2)若
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