已知函数
(
为自然对数的底数),函数
.
(1)求函数
的极值;
(2)若不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2f01f903ee8ec1443db1201b9cdd07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7809516da3060ad7baa1ba093533bc9f.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a1879d006aea4ef652a49a11b4916c.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7babc306b9e328bf6f27825dfbcaa393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/359ae6b8b6fd0c1e5ae2b4160f31a8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2020-12-08 14:52:24
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适中
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解题方法
【推荐1】已知函数
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(1)求
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(2)令
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d523262349ef05ca8b2bb2a5edd968e0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7f06e7a8e6e3b216650b121b562505.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10374d0f678bb5ff86d88756065ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bb01c98cd9f14d60f5dcc081086255.png)
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【推荐2】已知函数
.
(1)设
,求函数
的单调区间;
(2)若
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,试判断是否存在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800fc0cd48efce25f972fee263c43652.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5cda759116e9bd9c2725374a9a6717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b014e16147e77ef4b1d580a3511d10ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06efdd377ba89a552eb8bffef232fd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
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【推荐3】已知函数
在
处取得极小值
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有三条切线,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c62a0f3c5e245baae998f587ca435e2.png)
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(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fb95c0dbba2ce77a7dcc42fa06e058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】设函数f(x)=ex﹣λx﹣1(λ∈R).
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(2)若不等式f(x)≥0恒成立,求λ的值.
(1)若λ=2,求函数f(x)的单调区间;
(2)若不等式f(x)≥0恒成立,求λ的值.
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解答题-证明题
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解题方法
【推荐2】已知函数
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(1)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8180bc243aad2b7736998b10aa2b571a.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc218a784ed88bd1b8adc3647fcec56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
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【推荐3】已知直线l:
与函数
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(1)记
,求函数
的单调区间;
(2)若直线l与函数
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(3)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0aafd52e26c241c46d0206f42f415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7075548dc3ead0bf49f34541f52eaa.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c765461ae1a6c70f5cbdcb6c932a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
(2)若直线l与函数
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(3)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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