1 . 已知抛物线
:
的焦点为
,
为抛物线上一点,
为坐标原点,
的外接圆与抛物线的准线相切,且外接圆的周长为
.
(1)求抛物线
的方程;
(2)已知点
,设不垂直于
轴的直线
与抛物线
交于不同的两点
,
,若
,证明直线
过定点并写出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf041c30720cd85967d2dad318a21a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2804428c789eff0c917c50ac9aae0961.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57aeea6bd5484a6cf96168b5f4facbba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
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2 . 设抛物线
上的点
到焦点
的距离
.
![](https://img.xkw.com/dksih/QBM/2017/2/22/1629441596096512/1630187173249024/STEM/6a3ffe1cd14c4bb88a4cc68c63abd064.png?resizew=168)
(Ⅰ)求抛物线
的方程;
(Ⅱ)如图,直线
与抛物线
交于
两点,点
关于
轴的对称点是
.求证:直线
恒过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a296618fd3752403b88ca31c2d9071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd59094a41591661dc889b6219197b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f53d2066ab69620c09b8a11cae640d0.png)
![](https://img.xkw.com/dksih/QBM/2017/2/22/1629441596096512/1630187173249024/STEM/6a3ffe1cd14c4bb88a4cc68c63abd064.png?resizew=168)
(Ⅰ)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d00cde4e1f24acf75e642a7963822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1567d8f98fabc1a3948f8602cc5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
您最近一年使用:0次
2017-02-23更新
|
1277次组卷
|
2卷引用:2016-2017学年山东省德州市高二上学期期末检测数学(理)试卷