已知函数
.
(Ⅰ)当曲线
在
时的切线与直线
平行,求曲线
在
处的切线方程;
(Ⅱ)求函数
的极值,并求当
有极大值且极大值为正数时,实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa085228756ef15d317272b76ecba95.png)
(Ⅰ)当曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0471f0ffd5307ac3ae4fb7d31d397600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(Ⅱ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2020高三·全国·专题练习 查看更多[1]
(已下线)第03章 导数及其应用(单元检测)-2021届高考数学(理)一轮复习讲练测
更新时间:2020-09-11 12:33:32
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解题方法
【推荐1】如图,已知抛物线C:
(p>0)的焦点为F,过点F的直线l与抛物线交于AB两点,且
的最小值为4.
![](https://img.xkw.com/dksih/QBM/2021/10/28/2839009216544768/2839673831825408/STEM/686ee163-4649-4781-879a-0b1f0e486c5a.png?resizew=220)
(1)求抛物线C的方程;
(2)过A、B分别作抛物线C的切线,两切线交于点M.
①求证:以M为圆心,MF为半径的圆恰与直线l相切;
②设直线l与准线
交于点N,若
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://img.xkw.com/dksih/QBM/2021/10/28/2839009216544768/2839673831825408/STEM/686ee163-4649-4781-879a-0b1f0e486c5a.png?resizew=220)
(1)求抛物线C的方程;
(2)过A、B分别作抛物线C的切线,两切线交于点M.
①求证:以M为圆心,MF为半径的圆恰与直线l相切;
②设直线l与准线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d107d17e35b14faefa0d7f8adeb084b.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)求
在
上的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9ed06ea41503f9d83fe4fb359eed85.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a475f28eb85bd35b5271d381ed1404.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fc56ca000b11a1239a84849f98f4b7.png)
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【推荐3】已知
,函数
.
(1)讨论函数
的单调性;
(2)若
是
的极值点,且曲线
在两点
,
处切线平行,在
轴上的截距分别为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddede6227a2b19c6879a162597508c2d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb143809ab6388a504d125149fe7afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be7eb47ee7ef5265b4ccd6b1d4a46de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc85af36f64be115dd7c5d88fac6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f12c60294fc2faefcf22ab41369d6a.png)
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【推荐1】已知函数
在
上有极值2.
(1)求实数
的值;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55b1fd9021a267beb1169f0f8efeb16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5c52f93d67388fd710414da87e33d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】已知函数
.
(1)当
时,求函数
在
上的最大值;
(2)若函数
在
处有极小值,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ded4b0470a47d923ef96f773688a28.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8a3c42b668add988790e1c1bac76e6.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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