题目
题型:不详难度:来源:
A.选修4—1 几何证明选讲
在直径是
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012227-65343.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012227-58435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012227-21635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012227-49250.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012228-74712.gif)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012228-92630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012228-25294.gif)
答案
证明:作
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012228-43480.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012229-24656.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012229-69678.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012229-80955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012229-63169.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012229-13883.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012230-44997.gif)
(1)+(2)得
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012230-77877.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012228-92630.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012215-40071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012215-87455.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012215-46904.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012215-48963.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012215-80139.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012216-43651.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012216-71334.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012216-11550.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012216-34265.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012217-47330.gif)
(2)求线段
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012217-58146.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012212-34523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-87811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-78843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-35321.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-87811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012206-90670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-78843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012206-50303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012205-78843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012206-75391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012206-73704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012207-56673.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012207-24116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012207-84246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-57794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-52128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-86942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-30567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012201-41192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012201-60937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-30567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012200-86942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012201-11823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012201-41192.png)
如图,PA切圆O
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012155-98450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012155-37306.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012156-58233.gif)
(1)求线段PD的长;
(2)在如图所示的图形中是否有长度为
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108012156-45243.gif)
最新试题
- 1平行四边形ABCD的周长为36cm,若AB:BC=1:5,则AB="____cm" BC=___cm;
- 2I have to admit: I don’t flush(冲) the toilet every time I go
- 3A.单糖是不能发生水解的最简单的糖类B.分子式符合Cn(H2O)m通式的物质,都是糖类物质C.淀粉、纤维素都是天然有机高
- 4【题文】若函数在上是单调函数,则的取值范围是( )A.B.C.D.
- 5(2009·山东烟台适应考试一)目前,我国房地产业“有价无市”是个不争的事实,过高的房价使工薪阶层“望房兴叹”。 20
- 6阅读下面的文言文,回答后面的问题。游石房洞山二十七日晨起,饭而行。由冈东南下峡,一里余,复有烟气郁勃,则热水复溢坞中,与
- 7关于我国各地土壤的说法错误的是A.东北地区—白土地B.华北地区—黄土地C.南方地区—红土地D.四川盆地—紫色盆地
- 8一个社会调查机构就某地居民的月收入调查了10000人,并根据所得数据画了样本的频率分布直方图(如下图).为了分析居民的收
- 9函数的值域是 ;
- 10假定你走在街上,有人用责怪的目光盯着你,因为你毫不在乎地往地上吐了一口痰。这说明 [ ]A.他人不懂得尊重自己
热门考点
- 1He runs every day. ______, he has lost weight and become he
- 2David has won the first prize in singing; he is still very e
- 3如图甲所示,空间Ⅰ区域存在方向垂直纸面向里的有界匀强磁场,左右边界线MN与PQ相互平行,MN右侧空间Ⅱ区域存在一周期性变
- 4烈性炸药TNT的化学成分是三硝基甲苯(C7H5N3O6),爆炸时发生的化学反应可表示为:4C7H5N3O6+21O228
- 5西太平洋副热带高压脊线位置的年际变化与东部地区降水的变化密切相关,我国锋面带的位置大约在副热带高压脊线以北约5°C~8°
- 6a4•(-a)5-(-a)4•a5.
- 7密闭有空气的薄塑料瓶因降温而变扁,此过程中瓶内空气(不计分子势能)[ ]A.内能增大,放出热量 B.内能减小,吸
- 8下列关于水的说法正确的是: A.矿泉水是纯净物B.过滤可除去水中的固体杂质C.水资源是取之不尽的D.将硬水降温可降低水的
- 9_____Millie and you like walking after super?A.AreB.DoC.Does
- 10甲、乙、丙三名射击运动员射中目标的概率分别为、a、a(0<a<1),三人各射击一次,击中目标的次数记为ξ.(1)求ξ的分