如图,已知抛物线与坐标轴分别交于A
、B
、C
三点,过坐标原点O的直线
与抛物线交于M、N两点.分别过点C、D
作平行于
轴的直线
、
.(1)求抛物线对应的二次函数的解析式;(2)求证:以ON为直径的圆与直线
相切;(3)求线段MN的长(用
表示),并证明M、N两点到直线
的距离之和等于线段MN的长.
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/4fbddbdfabab4550bfb83c4a46fda115.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/28c38477a2914d08bf56d2768b291972.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/50ae5727b62d4679bdd6542feadbc2ac.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/15a03c0f8234483e834cd3969fb73c58.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/b3bc8f851d394332b24cab8ca34b570e.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/c8e31e3a457f47eda0042ba68a5abd4e.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/02e26592ab7546678bb399f665cd0e99.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/eb5ae2f76bd4437097ad0cc25765eb30.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/02e26592ab7546678bb399f665cd0e99.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/2ba5c2ddc3324d15a776a0334d36274d.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/eb5ae2f76bd4437097ad0cc25765eb30.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/8073397b2f20477895392153773e3195.png)
12-13高一上·江西九江·阶段练习 查看更多[1]
(已下线)2012-2013学年江西省九江一中高一10月月考数学试卷
更新时间:2016-12-02 01:49:58
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适中
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名校
解题方法
【推荐1】设二次函数
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(2)当函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐1】已知抛物线
的焦点为
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交抛物线
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两点,当
轴时,
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(1)求抛物线
的标准方程;
(2)当线段
的中点的纵坐标为3时,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
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(1)求抛物线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知O为坐标原点,F为抛物线
的焦点,
为抛物线上一点,且
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(1)求抛物线方程及P点坐标;
(2)过点F的直线与抛物线相交于A,B两点,直线OA,OB分别与其准线相交于C、D两点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431582d30a11bf53bf617b91a6bde2be.png)
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(1)求抛物线方程及P点坐标;
(2)过点F的直线与抛物线相交于A,B两点,直线OA,OB分别与其准线相交于C、D两点,证明:
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