设函数
,
(1)当
时,求函数
在点
处的切线;
(2)若
,都有
,求正实数
的取值范围;
(3)当
时,曲线
上的点
处的切线与
相切,求满足条件的
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e044c49cd2304f5057b85704e0901408.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6422b9c2e93a91fe9e39ce4d9dabb0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefe012c95fa9c8bc294d25eb239a172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
更新时间:2020-11-12 16:52:10
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
的导函数为
,且
.
(1)求函数
在
处的切线方程;
(2)证明:
在
上仅有一个零点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8a101064190710c2287cfe5931f672.png)
(1)求函数
![](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/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5085c14cc9d275af1875b7f58575200e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ff090e7db6b070e17df2269e4bd564.png)
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解答题-证明题
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较难
(0.4)
名校
【推荐2】已知函数
,g
.
(1)求
在点
处的切线方程;
(2)讨论
的单调性;
(3)当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f8301273e322867a8a70afbd6ecb54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb14416005b98c9017884b53c07b12bb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3829d4ac31608ee00d6f09994fad3b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7906c86b5445f1e96ae83294d2e2b53f.png)
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|
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(0.4)
名校
解题方法
【推荐1】已知函数
.
![](https://img.xkw.com/dksih/QBM/2022/6/21/3006298036830208/3007458379792384/STEM/d374d095ef624b99ad0db955abf96ae9.png?resizew=256)
(1)若函数
在
处取得极值,求a的值;
(2)设直线
,将坐标平面分成Ⅰ,Ⅱ、Ⅲ、Ⅳ四个区域(不含边界),若函数
的图象恰好位于其中一个区域内,试判断其所在的区域,并求其对应的a的取值范围.
(3)试比较
与
的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc86e5d66377f206fccadcd3d1bae576.png)
![](https://img.xkw.com/dksih/QBM/2022/6/21/3006298036830208/3007458379792384/STEM/d374d095ef624b99ad0db955abf96ae9.png?resizew=256)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de7c19c8a68f58cbcb37e9140bcb469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(3)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed533703d6b7356347117baac0f128e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2abb999bee661ea9205f53929dba24.png)
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【推荐2】已知函数
,其中
,
.
(1)当
时,求函数
的单调区间;
(2)若
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771227bb82ed7385d3b3f169c14f338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be1d8c6384d7fabddb693b2b7fcdf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐1】设
,函数
,其中
为自然对数的底数.
(1)设函数
.
①若
,试判断函数
与
的图像在区间
上是否有交点;
②求证:对任意的
,直线
都不是
的切线;
(2)设函数
,试判断函数
是否存在极小值,若存在,求出
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb3b19935ac486fe6e675851b4719d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea37a0c5f1b0ec98b3ef63e87f9f310.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa17026b7199764dc88e060331faf49.png)
②求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1259e740f285efce5efa7ae52df424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】已知函数
.
(Ⅰ)设函数
,当
时,证明:当
时,
;
(Ⅱ)若
有两个不同的零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d953e0555ad7f4e3474347e366b400.png)
(Ⅰ)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c00f18cd1ec6ae9631830ac4b99d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0324b90e16f458885986d4aff7090884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c248d8613ccdba6751164db6dd43629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc2395f479a7f620dc7a8168f87adef.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9168274ae1d5f93647f01b4455a8d42a.png)
您最近一年使用:0次
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【推荐3】已知函数
.
(1)讨论
零点的个数;
(2)若
有两个解
,且
恒成立,求正整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc357a4201492d86f69c9f11b45296a4.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0152e337797895f2f85e6ed4d33cd02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37b958bf43697e51e0f84c2aafda9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
,
,
.
(1)当
时,判断函数
在
上的单调性及零点个数;
(2)若关于
的方程
有两个不相等实数根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c7ef8fa23ec34062a02d23d04e7ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab37d5feb98bc9c9301c6e211568b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79fe3414b32bbd1190b41ed8307f905.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f611baff5fce8cfdb28a6db3f43b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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【推荐2】已知函数f(x)=a+
·ln x(a∈R),试求f(x)的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f457e696b1504bfb73140699a8e18dd0.png)
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解答题-证明题
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较难
(0.4)
名校
【推荐3】已知函数
.
(1)当
时,证明:
只有一个零点.
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379164b4c4bf35f19fc964dcfcb7ab02.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b581098a825ab4b15667fa1e331bc307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次