名校
解题方法
1 . 已知椭圆:
,当椭圆形状最圆时为椭圆
.
(1)求椭圆
的方程;
(2)设过椭圆
左焦点的两条弦
、
斜率分别为
、
,当
时,是否存在
使
成立,若存在,求出满足条件的
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5031ecbda1da1c5869a705c1fa73ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b728c0e69820cdcd839e67ffdb1014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18419ab2d7cde42b1130e9894dc5b9e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37267065ff27e9b1bd552e8b03cb97ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
名校
2 . 如图所示,“嫦娥一号”探月卫星沿地月转移轨道飞向月球,在月球附近一点
变轨进入以月球球心F为一个焦点的椭圆轨道Ⅰ绕月飞行,之后卫星在
点第二次变轨进入仍以F为一个焦点的椭圆轨道Ⅱ绕月飞行,最终卫星在
点第三次变轨进入以F为圆心的圆形轨道Ⅲ绕月飞行.若用
和
分别表示椭圆轨道Ⅰ和Ⅱ的焦距,用
和
分别表示椭圆轨道Ⅰ和Ⅱ的长轴的长,给出下列式子:①
; ②
; ③
; ④
.其中正确的式子序号是______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8ef3f4a8e843a79c3b03adeb61adab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85963eb36e1406ca2dfd1d039fbeaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39835887158fcba559fdfe35ebb5c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2667a6c91b720ca9b42d092c776cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cd5e8a611849b4474ec09ceea7e8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8eb7880835a50b6c17e21f4f1cfefc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebbeee654142a592eb0f7d79c3ad83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4265894a8ecb24e6876b72eefcb8c1d1.png)
![](https://img.xkw.com/dksih/QBM/2015/7/2/1572161977655296/1572161983348736/STEM/2ca0281d1bfb43348c3b59ec8ea9ab81.png?resizew=98)
您最近一年使用:0次
2016-12-03更新
|
527次组卷
|
3卷引用:2014-2015学年湖南省浏阳市一中高二下学期第一次段测理科数学试卷