1 . 已知椭圆
的一个焦点与抛物线
的焦点相同,A为椭圆C的右顶点,以A为圆心的圆与直线
相交于P,
两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2997349c00e4c8414a9050b50425241f.png)
(Ⅰ)求椭圆C的标准方程和圆A的方程;
![](https://img.xkw.com/dksih/QBM/2018/4/7/1918897805697024/1920430892818432/STEM/c80842fd-b17f-41e5-8d14-1dd2f728423b.png)
(Ⅱ)不过原点的直线
与椭圆C交于M、N两点,已知OM,直线
,ON的斜率
成等比数列,记以OM、ON为直径的圆的面积分别为S1、S2,试探究
的值是否为定值,若是,求出此值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dab1d87938dc3db47ee089bb46b68c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac89d45e79b10741d93a9443c70adde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2997349c00e4c8414a9050b50425241f.png)
(Ⅰ)求椭圆C的标准方程和圆A的方程;
![](https://img.xkw.com/dksih/QBM/2018/4/7/1918897805697024/1920430892818432/STEM/c80842fd-b17f-41e5-8d14-1dd2f728423b.png)
(Ⅱ)不过原点的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fec6efa333e34c57722ca8dcb8fbf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
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2018-04-09更新
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3卷引用:江西省红色七校(分宜中学、会昌中学等)2021届高三第二次联考数学(理)试题