已知
,
,(
为自然对数的底数,
…).
(Ⅰ)当
时,若函数
与直线
相切于点
,求
,
的值;
(Ⅱ)当
时,若对任意的正实数
,
有且只有一个极值点,求负实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bbe6953d17805372e7902d89598863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83eff972e33c47b936b487382b92753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07d7af2ede4abfa4d647b4058992d00.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c21ab40ef86e0f4c996da62ecbbef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93c13c9d1a1f85ab7a9b044c669bf53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4d3681dc6f3730b50e99f6cf7c4b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
20-21高三下·浙江·阶段练习 查看更多[3]
浙江省五校2021届高三下学期5月联考数学试题(已下线)【新东方】【2021.5.19】【SX】【高三下】【高中数学】【SX00131】(已下线)专题4.8—导数大题(极值与极值点问题)-2022届高三数学一轮复习精讲精练
更新时间:2021-05-11 11:20:59
|
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解答题-问答题
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困难
(0.15)
解题方法
【推荐1】已知函数
在
处的切线方程为
.
(1)求
的值;
(2)当
时,
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的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7973ff0210d21735d7f3d898e1fa85f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa48a9bf6633b475eb8a339214cc0330.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49346f8bfa7c32cc6ab3336726acbb67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐2】设函数
,曲线y=f(x)在x=1处的切线与直线y=3x平行.
(1)判断函数f(x)在区间
和
上的单调性,并说明理由;
(2)当
时,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d483445cb1068a7ca97026f30ffef5d6.png)
(1)判断函数f(x)在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a446ed1a23fa9cb77b8358439b8e092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50fea4f0abf56345b563f8ae7fb5416.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530d4bafdbbbcc242e06112039ad34c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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困难
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【推荐1】已知函数
.
(1)若函数
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的取值范围;
(2)在(1)的条件下,证明当
时,
的图像恒在
轴上方.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e00993ca282213a072ee777a61419e2.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)在(1)的条件下,证明当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-证明题
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【推荐2】(1)证明:当
时,
;
(2)已知函数
,若
是
的极大值点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca542e78b7d77d008c9c4752afa91a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7552a9166b5242bc9bf777cc859c20a1.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b144bc49aebea25b699f42c532f65367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
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【推荐3】已知函数
存在两个极值点,且极大值点为
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(1)求a的取值范围;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e150d766ffd7542cf7bb515231c226e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
(1)求a的取值范围;
(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5178f39571d92a6c0c5df19e4799e0b7.png)
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