1 . 椭圆
的焦距为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc0a237b848088bf4ca9f82a1dd2b0.png)
A.![]() | B.4 | C.![]() | D.2 |
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解题方法
2 . 已知椭圆的方程为
,则该椭圆的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
A.长轴长为2 | B.短轴长为![]() | C.焦距为1 | D.离心率为![]() |
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3 . 椭圆
的焦点坐标为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c190e8bb81a4d26cf638ed246193cc9.png)
您最近一年使用:0次
4 . 若椭圆
(
)与双曲线
的焦点相同,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57c41377103ef1c54a2c070b07b7bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47593bd89caf913e21983fb91ac84f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.25 | B.16 | C.5 | D.4 |
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5 . 已知抛物线
与椭圆
有公共的焦点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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6 . 若直线
经过椭圆
的一个焦点,则
的值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f9bd7fdb0c44b5e2e1d5a59dd6f7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc439302e947dd0a1b4eb36eada91b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.2 | D.4 |
您最近一年使用:0次
解题方法
7 . 焦点在
轴上,且长轴长与短轴长之比为
,焦距为
的椭圆方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320896d1b4b9217d9ba527604ac35d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e609d7f5a3b904e30f43fbbc26033d7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
8 . 已知焦点在
轴上的椭圆
的焦距大于6,则
的值可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b846664dd06085cd0f23cabb91ef9d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.6 | B.7 | C.![]() | D.9 |
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9 . 椭圆
的焦点
的坐标为_____ ,若
为椭圆上任意一点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53836c455d2f63d7ad643dcead96e00.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89c03d164b45b7e9d3426efa62eb33a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48932773034bb6e1651acf140d47822c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53836c455d2f63d7ad643dcead96e00.png)
您最近一年使用:0次
名校
10 . 若椭圆
的一个焦点坐标为
,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb310da4ecca422169017ef85bde17af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次