如图所示,正方形
的边长为
,点
是
的中点,动点
从点
向点
运动,速度为
,到点
时停止运动;同时,动点
从点
出发,沿
运动,点
的速度为
.设点
的运动时间为
秒,
的面积为
,能大致刻画
与
的函数关系的图像是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/748d16d0-b73a-4228-8fbb-9b3ba4e24601.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad42a06900bd08d0c997d6adb09d36f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4491eea4326e242bcd914c95361922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d1c5957476505eb416f33e2940c49e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999c42a021bdc576f097246b9e64d986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/748d16d0-b73a-4228-8fbb-9b3ba4e24601.png?resizew=134)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-04-24 22:57:31
|
【知识点】 图形运动问题(实际问题与二次函数)解读
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【推荐1】如图,AB是⊙O直径,弦CD交AB于E,∠AEC=45°,AB=2.设AE=x,CE2+DE2=y. 下列图像中,能表示y与x的函数关系的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/70fe446c-d82c-4988-abf2-2004720a8071.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/70fe446c-d82c-4988-abf2-2004720a8071.png?resizew=156)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图①,在矩形
中,当直角三角板
的直角顶点
在
上移动时,直角边
始终经过点
,设直角三角板的另一直角边
与
相交于点
.在运动过程中线段
的长度为
,线段
的长为
,
与
之间的函数关系如图②所示.则
的长为( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712391370153984/2717956349648896/STEM/9bec5ea1-dc07-4af2-a336-ddb2f20a280e.png?resizew=442)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bfd8e9f2f08a5807a23677988b240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712391370153984/2717956349648896/STEM/9bec5ea1-dc07-4af2-a336-ddb2f20a280e.png?resizew=442)
A.2.25 | B.3 | C.4 | D.6 |
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