如图,
中,
,点P从点B出发向终点C以1个单位长度/s移动,点Q从点C出发向终点A以2个单位长度/s移动,P,Q两点同时出发,任意一点先到达终点时,两点同时停止,当
的面积等于4时,则P,Q两点同时移动的时间是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/623d5ccc-2f88-438c-a26f-bf1cfad1fc91.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2a6cc47e82329ff760ad3826ae5cb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/623d5ccc-2f88-438c-a26f-bf1cfad1fc91.png?resizew=122)
A.1秒或4秒 | B.1秒 | C.2秒或4秒 | D.4秒 |
更新时间:2024-02-20 09:48:23
|
【知识点】 动态几何问题(一元二次方程的应用)解读
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【推荐1】如图,在
中,
分别是
上的动点,若点
同时从
两点出发分别沿
方向向点
匀速运动,它们的速度都是
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A.2 | B.3 | C.4 | D.5 |
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【推荐2】如图,在
中,
,点
从点
开始沿
边向点
以
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由
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匀速移动,当
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时运动时间为( )
![](https://img.xkw.com/dksih/QBM/2019/12/10/2352138650189824/2352839253483520/STEM/1cad35b69c2e4bc8a5c2f145c7582767.png?resizew=165)
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A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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