解题方法
1 . 已知椭圆方程为
,过椭圆的
的焦点
分别做
轴的垂线与椭圆交于四点,依次连接这四个点所得的四边形恰好为正方形.
(1)求该椭圆
的离心率.
(2)若椭圆
的顶点恰好是双曲线
焦点,椭圆
的焦点恰好是双曲线
顶点,设椭圆
的焦点
,双曲线
的焦点
为
与
的一个公共点,记
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求该椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e70ab7d7307661b15ad4e2162181e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d16e69e3f199e997ef40e321fb945a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46cc87319efe1341a3d5e66b2a9e261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90c37a58bb4575a7bb223c3ab776163.png)
您最近一年使用:0次
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解题方法
2 . 若正四棱柱
的底面棱长为4 ,侧棱长为3 ,且
为棱
的靠近点
的三等分点,点
在正方形
的边界及其内部运动,且满足
与底面
的所成角
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/6/27/3010367002787840/3011755104649216/STEM/ce1c1f9450e549cbb80270b07c343ec2.png?resizew=270)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6628d0bd96fb5bef05eaeb9ab71529ea.png)
![](https://img.xkw.com/dksih/QBM/2022/6/27/3010367002787840/3011755104649216/STEM/ce1c1f9450e549cbb80270b07c343ec2.png?resizew=270)
A.点![]() ![]() |
B.四面体![]() ![]() |
C.有且仅有一个点![]() ![]() |
D.线段![]() ![]() |
您最近一年使用:0次
2022-06-29更新
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