已知椭圆
的左、右焦点分别为
,上顶点为
,离心率为
为
上关于原点对称的两点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb0ef5e6c3771175aff1b8fc9e17110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4964c014567ab3586af0b762e046dcbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() ![]() |
B.![]() |
C.四边形![]() ![]() |
D.当![]() ![]() ![]() ![]() |
更新时间:2024-03-04 23:25:58
|
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【推荐1】设椭圆
的右焦点为
,直线
与椭圆交于
,
两点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb4717d7fa6d522090c5e949f650bd8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() ![]() |
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【推荐2】在如图所示的棱长为1的正方体
中,点P在侧面
所在的平面上运动,则下列命题中正确的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
A.若点P总满足![]() |
B.若点P到点A的距离为![]() ![]() |
C.若点P到直线![]() |
D.若点P到直线![]() ![]() |
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【推荐1】已知椭圆C:
上有一点
分别为其左、右焦点,
,
的面积为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4299de7a7907ce46991a34309768c93c.png)
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A.![]() ![]() |
B.角![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() |
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【推荐2】已知椭圆C∶
(a>b>0)的左,右两焦点分别是F1,F2,其中F1F2=2c.直线l∶y=k(x+c)(k∈R)与椭圆交于A,B两点则下列说法中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
A.△ABF2的周长为4a |
B.若AB的中点为M,则![]() |
C.若![]() ![]() |
D.若AB的最小值为3c,则椭圆的离心率![]() |
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【推荐1】已知椭圆
的左、右焦点分别为
,离心率为
,且经过点
在椭圆上,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fb1f0bf79f24b9339dcc7c89958eb7.png)
A.![]() |
B.![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() |
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【推荐2】已知椭圆
:
的离心率为
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,
为
的两个焦点,
为
上任意一点,则( )
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A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.满足![]() ![]() |
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【推荐1】一般地,我们把离心率为
的椭圆称为“黄金椭圆”,则下列命题正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
A.若![]() ![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() |
C.若“黄金椭圆”的左焦点是![]() ![]() ![]() ![]() |
D.设焦点在![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐2】已知O为坐标原点,椭圆C:
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