已知函数f(x)=ex﹣ln(x+2).
(1)求f(x)在(0,f(0))处的切线方程;
(2)求证:f(x)>0.
(1)求f(x)在(0,f(0))处的切线方程;
(2)求证:f(x)>0.
更新时间:2022-11-09 19:23:21
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【推荐1】已知函数
是自然对数的底数).
(1)求函数
的图象在点
处的切线方程;
(2)若k为整数,且当
时,
恒成立,其中
为
的导函数,求k的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df1795d05d374b2f7adc751a88c4314.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71885f023172807ad43f2c9a670aa960.png)
(2)若k为整数,且当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72120311e5ee5b259439c87d5e9d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8cece62dd92a41de719bf33ee030a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐2】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)设
,记函数
在
上的最大值为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bb46545c1d19d4e7a7a250a80f3feb.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea9824af71c9da5db5a00ec06063024.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f659e61647ec88cd7985bb63373f8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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【推荐3】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d21aa72d718cf77f63f1eb76b548fe.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
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【推荐1】已知
(
是自然对数的底数,
)
(1)求
的极大值;
(2)若
是区间
上的任意两个实数,求证:
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2241e55b886625124c6b68c9948ca11.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760effa3c34aefb5d6bbd0e7ca0d48fd.png)
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【推荐2】如图,有一张半径为1米的圆形铁皮,工人师傅需要剪一块顶角为锐角的等腰三角形
,不妨设
,
边上的高为
,圆心为
,为了使三角形的面积最大,我们设计了两种方案.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/70a389bf-a521-46a3-833a-07aaa44cf533.png?resizew=144)
(1)方案1:设
为
,用
表示
的面积
; 方案2:设
的高
为
,用
表示
的面积
;
(2)请从(1)中的两种方案中选择一种,求出
面积的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/70a389bf-a521-46a3-833a-07aaa44cf533.png?resizew=144)
(1)方案1:设
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(2)请从(1)中的两种方案中选择一种,求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐3】设函数
,
.
(1)当
时,求方程
的根(其中
为自然对数的底数);
(2)求函数
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(3)当
时,记
,是否存在整数
,使得关于
的不等式
有解?若存在,请求出
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,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10f93d520fb1e011a83cf19d6a0975d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9f049a5f960728c60a909821b2404b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
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(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e01a643a6df588f55c1dcfa5dfe7132.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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解题方法
【推荐1】已知
.
(Ⅰ)令
,若
的图象上任意一点
处切线的斜率
恒成立,求实数
的取值范围;
(Ⅱ)当
时,设函数
,且函数
有且仅有一个零点,若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
(Ⅰ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81af61a449d06779722445976ea801ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fbbb9c4b0f7937c003ef2c218c02a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87c1f03225296eb920e133eb601f3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d09b9afd1a03e9ac8257e79f825125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc2a572edaa810398462297a5e900ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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适中
(0.65)
【推荐2】已知函数
.
(1)求函数
的单调区间及极值;
(2)若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f142882525d65ca7598efc4204cab9.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ef80dd1103d1408365dadbab04f52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题
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适中
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【推荐3】已知函数
.
(1)讨论
的单调性;
(2)设
,若对
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dced786e226d2da22e732a503578d19.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3881fa7fc347ccb2d46de69dc041907d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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