19-20高二·浙江·期末
解题方法
1 . 椭圆
,椭圆的焦距为2,长轴长是焦距的2倍.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/9107534f-9939-4e7c-a867-0f1e6ed33b0b.png?resizew=206)
(1)求椭圆C的方程;
(2)
,
,
,
分别与椭圆相切,且
,
,
,如图,
,
,
,
围成的矩形的面积取值记为S,求S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/9107534f-9939-4e7c-a867-0f1e6ed33b0b.png?resizew=206)
(1)求椭圆C的方程;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f2813ee8f26cca880b6427f5f545d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdb9d8425d73a68731f30e0c0e22260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6707d881334c507dc9f6e7b5bbfd91c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac146a46b4bac02776fb3d916bbd124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f2813ee8f26cca880b6427f5f545d0.png)
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