已知椭圆
的长轴长为20,离心率为
,左、右焦点为
,若
上的点
满足
,则
的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7285470bf401f5edaac641234ee6ff6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-20 10:44:39
|
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单选题
|
适中
(0.65)
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解题方法
【推荐1】在
中,
,
,
,则
面积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d2fd0800f4853441d81b77af1e3451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.3 | D.![]() |
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【推荐2】平面上有四点
,其中
为定点,且
为动点,满足
,
与
的面积分别为
,则
的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/42a5c935-066d-4434-84a9-995587234f3c.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ec0cf152e35708d87a83cb4cb56461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c9afad30052d7fb7c2fc79392f7050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8128736402724cfd849079922274b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c918ca5d4e6d46ed130f85e5fa608d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/42a5c935-066d-4434-84a9-995587234f3c.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列说法正确的是( )
A.在![]() ![]() ![]() |
B.在![]() ![]() ![]() |
C.在![]() ![]() ![]() |
D.在![]() ![]() ![]() |
您最近一年使用:0次
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【推荐1】已知椭圆E:
(0<b<2)的左、右焦点分别为F1、F2,过点F1的直线交椭圆E于A,B两点,若
,AF2⊥x轴,则椭圆E的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe6e7cb18d2a7662469b625f0ef7d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba61f98b935b997765c0331fabd425a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知椭圆
的离心率为
,两点
、
.若椭圆W上存在点C,使得
为正三角形,则椭圆W方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490c4d8099ce18ec2bace34ac40bf839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb9e88d3e58141dba299dcd8edc4e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】已知椭圆
,
、
分别为其左右焦点,点M在C上,且
,若
的面积为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39bbdf5cc5cbc3141521d6e25a797fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab92934b86c2a974f75c2e40bb4bc9e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90c19c80e3cae271b3c9813ec19ccac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2de2292904b991fbd7b1ef30e7203b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.![]() | B.3 | C.![]() | D.4 |
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【推荐2】直线
与椭圆
相交于A,B两点,设O为坐标原点,则“
”是“
的面积为
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff3ca9d16ea262007adb2d58467d78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8aa7829303183b14b56664edf833652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
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