名校
1 . 求抛物线
在
处的切线与抛物线以及
轴所围成的曲边图形的面积.(要求作图)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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名校
解题方法
2 . 有两个条件:①
在
时取得极大值
②函数
在
处的切线方程为
.这两个条件中,请选择一个合适的条件将下面的题目补充完整
只要填写序号
,并解答本题.
题目:已知函数
存在极值,并且__________.
(1)求
的解析式;
(2)当
时,求函数
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3414bf23995af4894acc47c1326c4108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c836a71df74cc47112e00b685bd6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
题目:已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e1cc1fc123af00b6af9a5af56d9fa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538193a4717d564c01145e82314c2d1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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3 . (1)求对数曲线
在点
处的切线方程,并画出对数曲线和所求切线的图象;
(2)再观察(1)中的图象,你可以发现___________,即_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(2)再观察(1)中的图象,你可以发现___________,即_________.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/76bc5f76-6dde-4468-827f-eb04411e4296.png?resizew=185)
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23-24高二上·江苏·课前预习
4 . 用割线逼近切线的方法求函数
在
处的切线的斜率,并画出曲线
在点
处的切线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca651bfc89628a3b05c6e87ce5d6f0.png)
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5 . 对数函数与指数函数的图象与性质.
过点
的切线方程,并画出对数曲线和所求切线的图象.
(2)观察(1)中的图象,你发现切线在切点
附近非常接近曲线吗?当
很小时,你能得出近似公式吗?试用此近似公式计算
以及
的近似值.
(3)再观察(1)中的图象,你可以发现切线
行在曲线
上方,即对所有的
,不等式
恒成立.试通过理论推导证明这个不等式.(提示:求函数
的最小值.)
(4)对数曲线:
关于直线
的轴对称图形
是什么函数的图象?对数曲线的切线的轴对称图形是曲线
的切线吗?试写出它的方程,并判断该切线是在曲线
的上方还是下方.你能得出什么不等式?
(5)为什么对数曲线
在点
处的切线的斜率
“正好”等于1?
因为当
时,
斜率
.
又因为当
,
,因此
.若将对数的底数取
,则切线的斜率
.
试仿此求出曲线
在点
处的切线方程.形式上复杂吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(2)观察(1)中的图象,你发现切线在切点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d99d2f9daf80dfcf2e6c27672d1797d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9d8d758af3394b9c9e5b78f6857dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a781ad6d16ef7ac9a003b5c7d88326e5.png)
(3)再观察(1)中的图象,你可以发现切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4123b4b9e76a410c64a08c0a8c134664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962b8282ce3b4f4e61401ab0b0d77d0e.png)
(4)对数曲线:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d00236ece53eb4096f2790ac7558d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d00236ece53eb4096f2790ac7558d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d00236ece53eb4096f2790ac7558d8.png)
(5)为什么对数曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
因为当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf1e14d47047d48867d2ddfcdab8794c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25928dffd91e172e00b53e1f01a03432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
又因为当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c4264ca2802df797282da720572031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107bedb79ebd387bf36d380c64f584cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e1452343fea476c4e1b0b16ca12e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
试仿此求出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f0fadbe551b0e0eb7bf9440be740b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
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解题方法
6 . 请按步骤,完成下面的任务.
(1)利用信息技术工具,分别画出
,0.5,0.1,0.05时,函数
图象.
(2)画出函数
的图象,并与上面的四个图象比较,当h越来越小时,你观察到了什么?
(3)猜测
的导数,它与基本初等函数的导数公式表中
的导数公式一样吗?
(1)利用信息技术工具,分别画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa575d601b92968dfcff972dfa111e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a408c19a450709e06a6e7f3e0d440f52.png)
(2)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
(3)猜测
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48345d239aaf8e9ca1ff2846c08a99.png)
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7 . 已知函数
在
处的切线l.
(2)在同一坐标系下画出
的图象,以及切线l的图象;
(3)经过点
作
的切线,共有___________条.(填空只需写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8f8f1c47e643c51225fb48b2fac810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)在同一坐标系下画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8f8f1c47e643c51225fb48b2fac810.png)
(3)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a20a61d384b658080b92d8c1a9e7c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8f8f1c47e643c51225fb48b2fac810.png)
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名校
解题方法
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b531609ea70e9a3d2e91d42581d4665.png)
(1)求函数
在区间
上的最值;
(2)在所给的坐标系中画出函数
在区间
上的图象;
(3)若直线
是函数
的一条切线,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b531609ea70e9a3d2e91d42581d4665.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fab11f38ab8593932082ec4d9c8c91f.png)
(2)在所给的坐标系中画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fab11f38ab8593932082ec4d9c8c91f.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bd2644fced5f81092a4c42a0d52741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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9 . 已知函数
在
处的切线为
.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968741377269760/2970688564609024/STEM/5abd7f35-500a-489d-869f-d2b195d2634d.png?resizew=465)
(1)求切线
的方程;
(2)画出切线
,以及函数
在区间
上的图象.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968741377269760/2970688564609024/STEM/5abd7f35-500a-489d-869f-d2b195d2634d.png?resizew=465)
(1)求切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)画出切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585ac79da065a04457d841dc88ebd2d.png)
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解题方法
10 . 在①
,
,②
,
,③
的图象在
处的切线方程为
这三个条件中任选一个,补充在下面的问题中,并求解.已知函数
,且______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/e3f5dd58-44ee-456a-bc47-20233b4b7fa3.png?resizew=229)
(1)求函数
的极值;
(2)画出函数
的大致图象并求
在区间
上的最小值.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1902a3b84b9d53491317d7bf121cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b7f202e492865ac4a92b7ba7a21a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196be101149acfb6a6c4ceca7fc96828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b60e79837da3363105775dff8543613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9b4ac1458224ff0cd58a9118a725c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab150bf68deac3e271c0650a74bc534a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88deb283438e42fa6d5356a8ccf039e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/e3f5dd58-44ee-456a-bc47-20233b4b7fa3.png?resizew=229)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5432187d1c042787433b7633292d00fe.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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