在平面直角坐标系中,对于任意相邻三点都不共线的有序整点列(整点即横纵坐标都是整数的点)
,
,
,
,
与
,
,
,
,
,其中
,若同时满足:①两点列的起点和终点分别相同;②线段
,其中
,则称
与
互为正交点列.
(1)求
:
,
,
的正交点列
;
(2)判断
:
,
,
,
是否存在正交点列
?并说明理由;
(3)
,
,是否都存在无正交点列的有序整点列
?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c49a850b33fbf578b39ee3465668b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae6115ce406c29ef251ddd70b1585ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2857fac4963b129d99e79dcb3e13d295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e01664ba1168eaf581819aec1cb1869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7f1d158b6d34882f3668177e764c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32a260ef8af3140a7c3a7f623eccf22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5775c683e7b3854cd4a286b2283f4fd2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119fc40b02c9cf2828eb74e23ca6351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6610b4fd3da7d962560b5b3802c2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e3ae0c8f703b9bc856ee4b9318b07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efad62799e99544f601612a248e52f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347022c550ba1c6a57a546ef3a89b1e6.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21da96e03a7825281bf2de6ffddabe51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c357326f35ada73f441258a140b1d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbe3908a5def6c19dd61539058cb582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412f54d36352609820c6a6faa22bf3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd2091fc39fab5be60bacfa98244d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29025fc079f34fb5e63c2f2889a5858.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8891b298bbf8f0ca2339813f98e726a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32a260ef8af3140a7c3a7f623eccf22.png)
22-23高一下·北京·期中 查看更多[3]
北京市第八十中学2022-2023学年高一下学期期中考试数学试题(已下线)微考点8-1 新高考新题型19题新定义题型精选(已下线)高一下学期第一次月考模拟卷(新题型)-同步题型分类归纳讲与练(人教A版2019必修第二册)
更新时间:2023-08-13 13:52:41
|
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】已知抛物线
,过抛物线C的焦点F的直线l交抛物线C于A,B两点,且A,B两点在抛物线C的准线上的投影分别P、Q.
(1)已知
,若
,求直线l的方程;
(2)设P、Q的中点为M,请判断PF与MB的位置关系并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88eec86c17ca9025e2a6c7db421f5c37.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ab82c33e6c1f8b73628fa78e6868b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fac3c20dc8980ea6abdca5cbb4d1.png)
(2)设P、Q的中点为M,请判断PF与MB的位置关系并说明理由.
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解答题-证明题
|
较难
(0.4)
名校
【推荐2】已知抛物线
,过定点
作不垂直于x轴的直线
,交抛物线于A,B两点.
(1)设O为坐标原点,求证:
为定值;
(2)设线段
的垂直分线与x轴交于点
,求n的取值范围;
(3)设点A关于x轴的对称点为D,求证:直线
过定点,并求出定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaaeb0e910606c3478402ba989ae020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)设O为坐标原点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658aa70a197c830aa765f2f7ea4c86c5.png)
(2)设线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432aae51854129e8c10f7c34c0c3a79f.png)
(3)设点A关于x轴的对称点为D,求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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