已知M,N是椭圆
上关于原点O对称的两点,P是椭圆C上异于
的点,且
的最大值是
,则椭圆C的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94165c5047e68e952df7a8dc6dc32fda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8eb37a4dd75318dcbd836395e575bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c46fcd1c49b5523af44624f57aec97.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2023·黑龙江哈尔滨·三模 查看更多[4]
黑龙江省哈尔滨市第六中学校2023届高三第三次模拟考试数学试题(已下线)重难专攻(八)圆锥曲线中的最值(范围)问题 讲(已下线)第05讲 椭圆及其性质(八大题型)(讲义)-2(已下线)专题11 平面解析几何-2
更新时间:2023-05-31 12:42:29
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适中
(0.65)
解题方法
【推荐1】如图,平面四边形
中
,
,
.则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/738c0914-2ce5-4e24-a896-33db85c35bb0.png?resizew=118)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/738c0914-2ce5-4e24-a896-33db85c35bb0.png?resizew=118)
A.![]() | B.![]() | C.![]() | D.3 |
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名校
解题方法
【推荐2】设向量
与
的夹角为
,定义
,已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9883f16cdef5fb87fb9d6a9897d113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edc4293826344ace72f6110fd89ac02.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在等腰梯形
中,
,且
,设
,
,以
、
为焦点且过点
的双曲线的离心率为
,以
、
为焦点且过点
的椭圆的离心率为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e823c9dc0a061db27040ac59fc4ef2d1.png)
![](https://img.xkw.com/dksih/QBM/2015/12/30/1572406206603264/1572406212534272/STEM/6bebd69f24694a5ca6e90b5bd3bf68b7.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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A.随着![]() | B.随着![]() |
C.为定值1 | D.为定值2 |
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解题方法
【推荐2】设椭圆
的焦点为
,直线l过
且和椭圆C交于A,B两点,且
,则椭圆C的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d732e6a8ff60632e5a4793463cead332.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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