3.1.1椭圆及其标准方程(2)
基础练
一、单选题
A.![]() | B.![]() |
C.![]() | D.![]() |
【知识点】 利用椭圆定义求方程 根据a、b、c求椭圆标准方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() ![]() |
【知识点】 根据a、b、c求椭圆标准方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199f454cb22c34dfa82798ebd6c9054c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c1fc5c26514dc4db3eb279b93850d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199f454cb22c34dfa82798ebd6c9054c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f8172cdbf6235d690f6ee6ff7914dc.png)
A.a2=25,b2=16 | B.a2=9,b2=25 |
C.a2=25,b2=9或a2=9,b2=25 | D.a2=25,b2=9 |
【知识点】 求椭圆的长轴、短轴
A.(0,+∞) | B.(0,2) | C.(1,+∞) | D.(0,1) |
【知识点】 根据方程表示椭圆求参数的范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60b2ac13f585da484720a3be0dd6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f26f6cc6cf7d49eeffa37036436bc54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.2 | C.![]() | D.![]() |
【知识点】 求椭圆的长轴、短轴
二、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
【知识点】 根据a、b、c求椭圆标准方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb30f745face2d86ef0f2af905c0e7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f2f4e27d0b5e39a967035a75215dce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492d1f0caaedffdecebec4d3b2206d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
【知识点】 椭圆的方程与椭圆(焦点)位置的特征 复数的分类及辨析解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31785896c255165256c5f616db5299c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b55f4ca2d21088854e1aeb040fa950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c70b997343f46b5e8fe90e738ca19d.png)
【知识点】 求点到直线的距离 根据a、b、c求椭圆标准方程
三、解答题
(1)两个焦点坐标分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4679108288671b54a85751cc1c49b06d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248909c543977b1a7490bc01fcf44d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6205da5e1d2730ee0b3de8bca3e29f5e.png)
【知识点】 利用椭圆定义求方程 根据a、b、c求椭圆标准方程