已知函数
.
(1)证明:函数
在区间
存在唯一的极小值点
,且
;
(2)证明:函数
有且仅有两个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8fed09e3b82d50dce81e6c9bfe0613.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fee0e4f79e30bbff8e4be338f6adec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be52b2e65ad6f6c6b168959573ef7253.png)
(2)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
更新时间:2019-10-23 12:33:04
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解答题-证明题
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【推荐1】已知函数
.
(1)求曲线
在
处的切线方程;
(2)若
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内有且仅有一个实数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83ba6c2b77e8985cd5ba45ead3e1f4b.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80d792456f58cf9fc8671d215659f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803a468e5d66004e57372a5bf2c5e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
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解答题-证明题
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(0.4)
解题方法
【推荐2】已知函数
.
(1)证明:当
时,
有唯一的极值点为
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(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6082bf1807875c773bc866e08d3e6bf1.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef118cce5443a4d794561f5ef8e1fcc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7417645b760b0e03cfe0bcdaa6a1d93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
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(0.4)
真题
解题方法
【推荐1】设函数
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(1)证明
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(2)设
为
的一个极值点,证明
;
(3)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d2a78d0eafddbe5edf83e86791d6cf.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf1626febdc487c710ffb74d54f33d4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3849d60a586fa54660cd3d653b01c66.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2506385d68e133523a24a5f5770adb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420314a5c70a97f508023e7f92762091.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)证明:函数
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在
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(参考数据:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba203c4c148c7948ec1faaa64f92e101.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db9e7c9705f6c58529cdcf7d3624455e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8ec0ccdb6db6fbaeb1172e281ec22f.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d73bcda1a31b7a8760ab3dd1363be07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93f072d5da2f0f2b590e353469ee83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ee43974961431f54966d0b25027c51.png)
您最近一年使用:0次
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名校
【推荐3】已知
,函数
.
(1)当
时,求曲线
在点
处的切线方程:
(2)证明
存在唯一的极值点
(3)若存在a,使得
对任意
成立,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2611ed88afaf272aa770d1c56541c87e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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(2)证明
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(3)若存在a,使得
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e82c4003d20b36777f7aea584e3dd4.png)
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