一个矩形的周长为16,设其一边的长为
,面积为
,则
关于
的函数解析式是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-09-21 22:46:08
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【知识点】 图形问题(实际问题与二次函数)
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适中
(0.65)
【推荐1】用一段长
米的篱笆围成一个一边靠墙的矩形花圃,墙长为
米,另三边用篱笆恰好围成.围成的花圃是如图的矩形
.设
边的长为
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的面积为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8078de3c5cce4a9410cd240174fd011.png)
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适中
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【推荐2】如图1,E是正方形
的边
上一点(不与点B,C重合),连接
,以
为边向右作正方形
,连接
.已知
的面积(S)与
的长(x)之间的函数关系如图2所示,若该抛物线顶点P的纵坐标为8,则正方形
的边长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
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