已知函数
.
(1)若
在
上单调递减,求
的取值范围;
(2)若不等式
恒成立,求
的取值范围.(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a77a65d9b01eb2e7d866924099534f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57af9c419fa7db9c47a212d5238aa435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8c11f468db4862ec12a39f80e3429b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c81e24d6dc8d8d0b9e4fae62936b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3caa37456ad465972bea16d93d02e1ee.png)
更新时间:2022-11-25 11:16:51
|
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解答题-证明题
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较难
(0.4)
解题方法
【推荐1】已知函数
,设
,
,其中
,
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(1)若函数
在区间
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(2)记
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707f641708905f9ee894da745360b1c1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60a63a5d08c62462d25bee7c832423d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71607511fdd4faa9e832345ceb2a817d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3204d0b7fa97986af4f4ccd1e955ae7.png)
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【推荐2】已知函数
,其中
是自然对数的底数,
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(1)当
时,求正整数
的值,使方程
在
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(2)若
在区间
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(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7343e8f9118952329c5c1072caa9b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733842be1a330aeaba21df805feb438b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
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(1)求
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(2)求证:存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db0eb7b60e88da1d807797cb17f85d0.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9820d4f84ba04057fc9138edab391529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)若
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5a082d00827cb23866c814ec22822d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
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(2)若
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