如图,一个质点在第一象限及
轴、
轴上运动,在第一秒钟,它从原点
运动到
,然后接着按图中箭头所示方向运动,即
,且每秒移动一个单位长度,那么第99秒时质点所在位置的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0a23a991caf22bb3b49b120efa7a81.png)
A.![]() | B.![]() | C.![]() | D.![]() |
21-22七年级下·湖北荆州·期中 查看更多[6]
湖北省洪湖市新堤中学2021-2022学年七年级下学期期中数学试题(已下线)专题10 平面直角坐标系(八大题型)-【好题汇编】备战2023-2024学年八年级数学上学期期末真题分类汇编(山东专用)(已下线)第七章 平面直角坐标系单元单元测试B卷山东省日照市东港区田家炳实验中学2023-2024学年七年级下学期4月月考数学试题(已下线)专题08平面直角坐标系(七大题型)-【好题汇编】备战2023-2024学年七年级数学下学期期中真题分类汇编(人教版,湖北专用)福建省莆田市城厢区莆田第二中学2023-2024学年七年级下学期期中数学试题
更新时间:2023-12-14 16:29:37
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【知识点】 点坐标规律探索
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【推荐1】如图,在平面直角坐标系
中,点
,
,…,都在
轴正半轴上,点
在二次函数
图象上,以
,
为邻边作平行四边形
,且
,延长
与二次函数
图象交于点
;以,
为邻边作平行四边形
,且
,延长
与二次函数
图象交于点
;…;按此规律进行下去,若
的横坐标为1,则
的坐标为( )
![](https://img.xkw.com/dksih/QBM/2023/1/4/3145446797533184/3149650510086144/STEM/428ecf3f36f14c7da32dae10668f964d.png?resizew=95)
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【推荐2】如图,在平面直角坐标系中,A(1,1),B(-1,1),C(-1,-2),D(1,-2).把一条长为2017个单位长度且没有弹性的细线(线的粗细忽略不计)的一端固定在点A处,并按A﹣B﹣C﹣D﹣A﹣…的规律紧绕在四边形ABCD的边上,则细线另一端所在位置的点的坐标是( )
![](https://img.xkw.com/dksih/QBM/2019/4/3/2174645490892800/2177217081974784/STEM/0cc2e85f5a4d43cdabffaede391300f4.png?resizew=80)
![](https://img.xkw.com/dksih/QBM/2019/4/3/2174645490892800/2177217081974784/STEM/0cc2e85f5a4d43cdabffaede391300f4.png?resizew=80)
A.(1,-1) | B.(-1,1) | C.(-1,-2) | D.(1,-2) |
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