已知函数
,
.
(1)讨论函数
的单调性;
(2)对实数
,令
,正实数
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c240746bb9e38a457a00f7d3ca39bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)对实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0752431826b4f4989b32fd081e832c2c.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/75e040af42a59f770fe4fa02bac3443f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
18-19高三·湖南长沙·阶段练习 查看更多[3]
更新时间:2020-02-22 22:12:26
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解答题-证明题
|
较难
(0.4)
【推荐1】已知函数
,
.
(1)求函数
的单调递减区间;
(2)设
,
.
①求证:函数
存在零点;
②设
,若函数
的一个零点为
.问:是否存在
,使得当
时,函数
有且仅有一个零点,且总有
恒成立?如果存在,试确定
的个数;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1077a73d600b6abcd970dc0f6104bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df639924a065191b2d46244207cdad61.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48aed85fb14b2e75cd3c996a3a3559df.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10870825032553c606e5350a6a3d9084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0794cc33ed2064e845d7fe654c15a8c.png)
①求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e036488fd966179bf822991619e3de0.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcb3d717642032e45e06064b600e8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e036488fd966179bf822991619e3de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2c53706ffc2184be7e57f0c9b68b9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
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解答题-问答题
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较难
(0.4)
名校
【推荐2】已知
是函数
的极值点.
(1)求
;
(2)证明:
有两个零点,且其中一个零点
;
(3)证明:
的所有零点都大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea764080dd9860df23c7022ca914ea6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31ec7374ee26d32346f96ac1e03d2fd.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13c1f9a7777c49671e1d6b4bb1e7f7e.png)
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解答题-问答题
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【推荐3】设函数
.
(1)当m=6时,求函数
的极值;
(2)若关于x的方程
在区间[1,4]上有两个实数解,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b69e13f9569f0fe4ba131517e6b921d.png)
(1)当m=6时,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0916efb285d909e67554eb4e93a9811d.png)
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【推荐1】已知函数
.
(1)当
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在点
处的切线方程;
(2)讨论函数
的单调性;
(3)若函数
在
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的极大值为
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c302ca0f8128ca72a59d1122639ad658.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989a9f9ac3471c832ea2105a823ea9b4.png)
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名校
【推荐2】已知函数
,
(
为自然对数的底数).
(1)讨论当
时,函数
的单调性;
(2)判断方程
是否有解,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca5b361f71989ffadf5a8a4b17e09f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da208132c56cf53ce7f4d0985582c6.png)
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(1)讨论当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1d1feee09e10e8eceb8a5ff31ba995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9781358e564f32054081a7e0b67fc936.png)
(2)判断方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ffa20871bf4e3ba3c43e94d2890468.png)
您最近一年使用:0次