题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104502-62664.png)
(1)当且仅当
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104502-32798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104502-56715.png)
(2)当直线的斜率为2时,求
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104503-77326.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104503-42631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104503-25267.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104504-16566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104504-46037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104504-92947.png)
(2)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104504-82241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104505-27562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104505-75417.png)
解:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104505-88695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104505-31425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104506-30058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104506-96151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104506-48843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104506-35619.png)
即当且仅当
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104503-42631.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104506-87635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104505-27562.png)
过点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104507-48274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104507-17386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104507-63215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104507-99438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104508-87750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104508-37001.png)
于是
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104508-57180.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104455-79225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104455-47759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104455-85236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104455-58620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104456-84548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-24108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-42415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-67627.png)
(1)求曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-24108.png)
(2)如果直线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-21936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-24108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-86155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104446-58827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104447-84570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104447-57649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104447-16021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104447-84570.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-65569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-10535.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-62549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-14701.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-71377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104441-57381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104438-94868.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104431-63364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024104431-45467.png)
(1)求C的方程;
(2)P为C上的动点,l为C在P点处得切线,求O点到l距离的最小值。
最新试题
- 1如图,下面是四部电影的宣传画,集中反映了某一时期的历史事件。其中,选项与宣传画不符合的是 A.北伐战争B.抗日战争
- 2用化学方程式表示下列反应.(1)铁丝在氧气中燃烧:______(2)加热高锰酸钾制取氧气:______(3)最近中国科技
- 3小虫从A点出发,在一 条直线上来回地爬行,假定向右爬行的路程记作正数,向左爬行记作负数,爬行的各段路程(单位:cm),依
- 4解释下列划线字词。(8分)小题1:佳木秀而繁阴( )小题2:去国怀乡( )小题3:斗折蛇行( )小
- 5我国自行研制并发射成功的风云一号、风云二号气象卫星都绕地球做匀速圆周运动,周期分别为12h和24h,下列说法中正确的是(
- 6碘酒是常见的消毒灭菌用品,它属于( )A.化合物B.单质C.溶液D.乳浊液
- 7如图,平面平面ABCD,ABCD为正方形,是直角三角形,且,E、F、G分别是线段PA,PD,CD的中点.(1)求证:∥面
- 8 随着科学技术的发展,化学农药的产量和品种逐年增加。但害虫的抗药性也不断增强,对农作物危害仍然很严重,如近年来
- 9在农田施肥时,洪星发现撒落在地上的碳酸氢铵(NH4HCO3)在阳光的照射下很快消失了,同时有浓烈的刺激性气味。为了探究N
- 10Tom’s mother kept telling him that he should work harder, bu
热门考点
- 1将1、、、按右侧方式排列.若规定(m,n)表示第m排从左向右第n个数,则(7,3)所表示的数是 ;(5,2)与(20,
- 2泛珠三角区域合作第二届盛会今天(2005年7月28日)在成都落幕。(如图所示)一如首届(注:首届“9+2”论坛暨洽谈会于
- 3下列说法哪个是正确的:A.物体运动的速度一定随着加速度的减小而减小B.加速度是描述物体速度变化的物理量C.加速度是指物体
- 4下列说法中,正确的是( )A.带根号的数是无理数B.8的立方根是±2C.若|a|=3,则a=3D.每个实数都对应数轴上
- 5实验室中要除去细碎铜屑中的少量细碎铁屑.某课外活动小组设计了两个方案:①Cu、Fe过滤→洗涤②Cu、Fe过滤→洗涤在上述
- 6中华民族在发展历程中,形成了自己特有的伟大民族精神。其核心是[ ]A、爱国主义B、解放思想,实事求是C、艰苦朴素
- 7季风水田农业主要分布在亚洲季风区,农作物以水稻为主。水稻习惯上被称为“亚洲的粮食”。据此回答47~49题。小题1:亚洲发
- 8在△ABC中,角A、B、C的对边分别是a,b,c,若a,b,c成等差数列,B=30°,△ABC的面积为,则b=(
- 9用二分法求的近似解(精确到0.1),利用计算器得,,则近似解所在区间是( )A.B.C.D.
- 10梁启超说:“我国蚩蚩四亿之众,数千年受治于民贼政体之下,如盲鱼生长黑壑,不知天地间有□□二字。”省略的两字最可能是(