数学家加斯帕尔·蒙日在研究圆锥曲线时发现:椭圆
任意两条互相垂直的切线的交点都在以原点O为圆心,
为半径的圆上,这个圆被称为该椭圆的蒙日圆.已知椭圆C:
可以与边长为
的正方形的四条边均相切,它的左、右顶点分别为A,B,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da001dad7941e6c9858637d7b62cec59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec92768b052f6ceb3efc112b7e48625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
A.![]() |
B.若矩形的四条边均与椭圆C相切,则该矩形面积的最大值为12 |
C.椭圆C的蒙日圆上存在两个点M满足![]() |
D.若椭圆C的切线与C的蒙日圆交于E,F两点,且直线OE,OF的斜率都存在,记为![]() ![]() ![]() |
2024·山东威海·二模 查看更多[1]
更新时间:2024-05-19 06:27:03
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【推荐1】如图所示,四边形ABDC为梯形,其中
,O为对角线的交点.有4条线段(GH、KL、EF、MN)夹在两底之间.GH表示平行于两底且于他们等距离的线段(即梯形的中位线),KL表示平行于两底且使梯形ABLK与梯形KLDC相似的线段,EF表示平行与两底且过点O的线段,MN表示平行于两底且将梯形ABDC分为面积相等的两个梯形的线段.下列说法中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/616ad507-dd52-430e-8e57-aceee5e77449.png?resizew=171)
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A.若![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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【推荐2】设正实数
,
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知椭圆
的长轴长为4,离心率为
分别为椭圆
的左、右焦点,过点
的直线
与椭圆
相交于A,B两点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.椭圆![]() ![]() |
B.椭圆![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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【推荐2】已知椭圆
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A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
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名校
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【推荐1】已知椭圆
,其右焦点为
,以
为端点作
条射线交椭圆于
,且每两条相邻射线的夹角相等,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252bab154aa5bdc9b4bce4c0d43aaf73.png)
A.当![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐2】已知椭圆
:
的左、右焦点为
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,点
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的直线
交椭圆于
,
两点,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb4717d7fa6d522090c5e949f650bd8.png)
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A.若![]() ![]() ![]() |
B.![]() ![]() |
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D.若![]() ![]() ![]() |
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【推荐3】已知
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B.若椭圆上恰有6个不同的点![]() ![]() ![]() ![]() |
C.若圆![]() ![]() ![]() ![]() ![]() |
D.若点![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
【推荐1】已知
、
是椭圆
的左、右焦点,
,椭圆上(异于顶点)的点
满足
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C.三角形![]() ![]() |
D.点![]() ![]() ![]() |
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【推荐2】已知椭圆
为原点,过第一象限内椭圆外一点
作椭圆的两条切线,切点分别为A,B.记直线
的斜率分别为
,若
,则( )
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A.![]() | B.![]() |
C.![]() | D.![]() |
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