已知函数
.
(1)讨论
的单调性;
(2)设
,证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bd79b059d1eb8d845c35e6b9138b78.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf8fd45f1f16ebbf0b5b912c9460f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bec51bbad4bade86c8f2c1903c02e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
更新时间:2022-08-29 19:06:40
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适中
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【推荐1】设函数
其中
,为自然对数的底数
(1)当a=1时,讨论f(x)的单调性;
(2)证明:当x>1时,g(x)>0.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32eb5765747a37a1bcf9eab15ddae49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f79304368295b27b8759d4762b03cb.png)
(1)当a=1时,讨论f(x)的单调性;
(2)证明:当x>1时,g(x)>0.
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【推荐2】已知函数
.
(Ⅰ)若函数
在点
处的切线方程为
,求切点
的坐标;
(Ⅱ)求证:当
时,
.(其中
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c621425806d10e735374571610b9a9ce.png)
(Ⅰ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518f4e49b74db4b939e3ed9f80b14378.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c70b997343f46b5e8fe90e738ca19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(Ⅱ)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9aa999a342513dd331685e80142772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d517cc191a0c78ec1d97af58ee705b19.png)
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【推荐3】已知函数
.
(1)求函数在点
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(2)若
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;
(3)若
在
有两个零点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea764080dd9860df23c7022ca914ea6.png)
(1)求函数在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
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解答题-证明题
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适中
(0.65)
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【推荐1】已知函数
.
(1)讨论
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(2)证明:当
时,
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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b03579ac1f4fe6051d186dfa14226a7.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779ccca0150f8410081e60459a20f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b7cfcc147916ae7eeb5d557fea945e.png)
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(1)当a=0时,求函数f(x)的极大值;
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适中
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【推荐3】已知函数
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(1)讨论
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dd0b6fdf1c5bd94912ec314e9690eb.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acabe548e7478967bd2546353f94961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424d32e8c44f9098e96c6be74fe3151e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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