名校
解题方法
1 . 已知四边形
是椭圆
的内接四边形,其对角线
和
交于原点
,且斜率之积为
.给出下列四个结论:
①四边形
是平行四边形;
②存在四边形
是菱形;
③存在四边形
使得
;
④存在四边形
使得
.
其中所有正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeb11677994ba487096958b1ad82ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
③存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e84f14a77c27b015b6b1cf0896228b1.png)
④存在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8d582c0bf83314b19df67e1bd2740.png)
其中所有正确结论的序号为
您最近一年使用:0次
2024-01-17更新
|
294次组卷
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4卷引用:北京市海淀区2023-2024学年高二上学期期末练习数学试卷
北京市海淀区2023-2024学年高二上学期期末练习数学试卷北京市人大附中2023-2024学年高二上学期期末数学试题北京市第五十七中学2023-2024学年高一1+3下学期期中考试数学试卷(已下线)2.2.2 椭圆的性质(十八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
2 . 设直线
与椭圆
相交于
、
两点,则线段
中点的坐标是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
名校
3 . 对于曲线
,若存在点
和常数
,过点
任引直线分别交
于
(均异于点
),若
,那么称曲线
与
相似,相似比为
,点
为相似中心.则下列各组曲线中,坐标原点
是其相似中心的是
.(把所有正确结论的序号都填上)
①
; ②
; ③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bcb166b53a49e393871bcb14a528792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237c115d5b39d761e1cbcae031070b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bad4cfc65766c9b0799c928075cc20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836f2cd7c1bf45a865b7d6bcb3e8f2d5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b112659d1a9e23b272da33b2833f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7214266d9a3342183ce6efd34aa4cb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97122dabde18b83dc228e37351a9ce8.png)
您最近一年使用:0次
2018-04-04更新
|
584次组卷
|
2卷引用:北京市北京八中2018届高三第二次月考数学理科试题