已知函数
,
为常数).
(1)若方程
在区间
上有解,求实数
的取值范围;
(2)当
时,证明不等式
在
,
上恒成立;
(3)证明
,
.(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0515998cdb1cd4b8cb11972b5bbe6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8447e8f186b4ed69301d77efc0827ce9.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4388fda43131ee01d2e97ce4754afa55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245cfb2581e2aa1ee9ddbf6f3de5747f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302337058242c7b78e3eb4ac7210b7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564c56d086bda3e2ab12473194570bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ac260d00e914288e1f036f1b647ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85569490f9cd7a6088279596944a099d.png)
(3)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541fe86667e19b0b3bdb4c7e6e0dc3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa150a07199279550038067fb295d59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a203b15848f4b52f967b2d08b69817.png)
2022高三·全国·专题练习 查看更多[2]
更新时间:2022-01-13 20:30:59
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
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(1)讨论函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006dd721f6e19ee105cf6e3a10b69c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a8de478b4c7988d7edd88a3320866a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415c90fda5b113d32651ecac1d5fb55.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ebd674cc3ffdb0909653916d392aa7.png)
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