如图,在
,
,
,
,点
在边
上,从点
向点
移动,点
在边
上,从点
向点
移动.若点
,
均以
的速度同时出发,且当一点移动到终点时,另一点也随之停止,连接
,则线段
的最小值是 _________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8008eab22184d57ef7d4258f2188f5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9547f6b5c7c54d216ecea72becb7d373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
2024九年级下·全国·专题练习 查看更多[1]
(已下线)重难点06+二次函数图象性质及其综合应用(2考点8题型)02
更新时间:2024-05-27 16:14:05
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适中
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【推荐1】如图,学校要在校园内建一个矩形的开心农场,其中一边
是围墙,且
的长不能超过
,其余三边
,
,
用
长的铁质栅栏.有下列结论:
①
的长可以为
;
②当农场
面积为
时,满足条件的
的长只有一个值;
③农场
面积的最大值为
;
④若把农场的形状改成半圆形,且直径一侧利用已有围墙,则农场的面积可以超过
.
其中,正确结论的是______ .(只需填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea591f7a39ea1f58f56bf3cb9b0b3b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495fdb2974e6b08e7125a1ee020f339.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50be18ebc9b5130c15f7365e2b8a7bbf.png)
②当农场
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a23dd676aac986d431ff5448684d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
③农场
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b13dfd39c703e3cb002ca010f566f7.png)
④若把农场的形状改成半圆形,且直径一侧利用已有围墙,则农场的面积可以超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966e8702d536bc0123e9ec374888183.png)
其中,正确结论的是
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/ec47e7ca-e2f6-4a44-bfb8-bed4af74528a.png?resizew=242)
您最近一年使用:0次
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【推荐2】已知k为任意实数,随着k的变化,抛物线
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【推荐1】在Rt△ABC中,∠C=90°,∠A,∠B,∠C所对的边分别是a,b、c,若a+b-c=4.s表示Rt△ABC的面积,l表示Rt△ABC的周长,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79949e2e4eee4c15c6e89ed4df8e2bb4.png)
________ .
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名校
【推荐2】有一块直角边
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的
的铁片,现要把它加工成一个如图所示的正方形(加工中的损耗忽略不计),则正方形的边长为______
.
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