现代城市大多是棋盘式布局(如北京道路几乎都是东西和南北走向).在这样的城市中,我们说的两点间的距离往往不是指两点间的直线距离(位移),而是实际路程(如图).在直角坐标平面内,我们定义
,
两点间的“直角距离”为:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ae27b795-0aee-45a5-a8be-c07085925e82.png?resizew=160)
(1)在平面直角坐标系中,写出所有满足到原点的“直角距离”为2的“格点”的坐标.(格点指横、纵坐标均为整数的点)
(2)求到两定点
、
的“直角距离”和为定值
的动点轨迹方程,并在直角坐标系内作出该动点的轨迹.(在以下三个条件中任选一个做答)
①
,
,
;
②
,
,
;
③
,
,
.
(3)写出同时满足以下两个条件的“格点”的坐标,并说明理由(格点指横、纵坐标均为整数的点).
①到
,
两点“直角距离”相等;
②到
,
两点“直角距离”和最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3764efd4b670b43d7886572974d6e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ae27b795-0aee-45a5-a8be-c07085925e82.png?resizew=160)
(1)在平面直角坐标系中,写出所有满足到原点的“直角距离”为2的“格点”的坐标.(格点指横、纵坐标均为整数的点)
(2)求到两定点
![](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/1efa45b6ea4a163cf0963ed2602cb4de.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9bece414af7ecb2d796dc8a6f549e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e62a44b8712ce4483b8710cda0dc1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503ac3fceba2e556caf8b120b93374fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3f1ca9b771a43e1148d95dc115e41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503ac3fceba2e556caf8b120b93374fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3f1ca9b771a43e1148d95dc115e41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
(3)写出同时满足以下两个条件的“格点”的坐标,并说明理由(格点指横、纵坐标均为整数的点).
①到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc9aa334c8a364cbc597127d60b2b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d3bfa155ad67018da4d65815c5e5b8.png)
②到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9194ae9aab90548e433bf0f4748ceb70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fe48905f1e58b2fe08706c2f53b55c.png)
17-18高二下·上海·阶段练习 查看更多[3]
上海市上海交通大学附属中学2017-2018学年高二下学期3月月考数学试题上海市上海交通大学附属中学2018-2019学年高二下学期3月月考数学试题(已下线)专题13 《直线与方程》中的动点动直线问题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
更新时间:2019-12-02 18:59:37
|
【知识点】 求平面轨迹方程
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知
:
,直线
交⊙O于A、B两点,分别过A、B作⊙O的切线,交于M点
(Ⅰ) 当
时,求弦长AB;
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(Ⅰ) 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4b89b590fb9a9bb70067026fc57816.png)
(Ⅱ) 若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e0db273061d0331e4e5da9ff1e955e.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知圆
,点
,点M在圆O上移动,且动点P满足
,求动点P的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0a2c3e186a1c1887b3f95a3c809fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8ce0afcbbfdcfe0cd9bdca796cdb22.png)
您最近一年使用:0次