名校
1 . 问题探究:
(1)如图1,在四边形
中,
,
,
,
.点F,E分别在
,
边上,连接
与
交于点O,且
.若
,
.求
的度数和线段
的长度.
问题解决:
(2)如图2,在矩形
花园的规划中,
米,
米,点E在
上,点F在
上,
,连接
,
交于点O,点P为
的中点,以
为直径修建一个圆形的水池养锦鲤,供游客欣赏.为了节约费用,要求这个圆形的水池面积最小,请求出水池面积的最小值.
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dda26560447cafbd6439ba5d8ad39b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd1ffa355edcdc023b5a6b47ca7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
问题解决:
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc37bedc5ccd9b87cfd90e3a62f80ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e5463fa46b911865fc2aa92387a0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次
2 . 为了弘扬耕读文化,进一步引导中学生树立正确的劳动价值观,提升劳动技能,某校搭建了一座劳动实践基地.基地中某一根黄瓜藤在钢圈的支撑下,其形状近似呈如图所示的抛物线形,黄瓜藤的藤根
和藤梢
均在地面上,以点
为坐标原点,
所在直线为
轴,过点
且垂直于
的竖直线为
轴建立如图所示的平面直角坐标系,矩形
是钢圈的支架,边
在
轴上,顶点
均在抛物线上,经测量,
,已知图中所有的点都在同一平面内.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c915f1c0-8443-4700-a0a2-e5e598b4646c.png?resizew=168)
(1)求该抛物线的函数表达式;
(2)已知在瓜藤上的点
处有一根黄瓜,点
到
轴的距离为
,为使黄瓜不长成弯曲状(黄瓜长度大于点
到
轴的距离时,黄瓜会长成弯曲状),在黄瓜不超过多长时就应该从瓜藤上摘下?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f0004125bae5a3a07c05993fe604ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c915f1c0-8443-4700-a0a2-e5e598b4646c.png?resizew=168)
(1)求该抛物线的函数表达式;
(2)已知在瓜藤上的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62521010677c2f1e5a0aeadc9c28027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
3 . (1)在等边三角形
中,点
分别在
上,
,当
______
时,
为等边三角形.
(2)如图1,在
中,
,求
面积的最大值.
(3)如图2,在一块四边形土地
上,准备搭建光伏基地,基地包含光伏逆变器和光伏太阳能板两个区域,
为光伏逆变器安装区域,阴影部分为光伏太阳能板安装区域,已知基地外围栏
,
,点
在
的中点上,
,
两点为汇流箱接口,
,按照设计要求,光伏逆变器安装区域(即
的面积)需要尽可能大,试求光伏太阳能板的占地面积的最小值.(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ba02a6816033ade98e679a59a3b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1039601edd7326b628a3201a3d4af948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
(2)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4709927bc8bd9754358c404fc05591ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图2,在一块四边形土地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7038d2782aaa29f1212a7d4c9d34060b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9b71be12c008d6b1a88e9e1577e1b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0a64888832f66a0cf0a2e63eab47f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/b18b9d3c-e343-4640-8759-d6755dd8e95d.png?resizew=481)
您最近一年使用:0次
2024-04-02更新
|
131次组卷
|
2卷引用:2024年陕西省榆林市子洲县子洲县周家硷中学一模数学试题
4 . 如图,在菱形
中,
,连接对角线
,E,F分别为
边上一动点,已知
,且
.
时,则有
________
(选填“>”,“<”或“=”);
(2)如图2,移动
,当
时,(1)中的结论是否成立?若成立,加以证明;若不成立,请说明理由;
(3)某校开辟了一块菱形“校园农场”
,已知该农场的一条边
长2米,且
,为了方便同学们随时观测农场内所种植物的生长情况,学校在“校园农场”的点D处设立了一个可旋转的监控摄像头,已知监控的可视角度为
,且监控在旋转过程中可视角度的边界会落在
边所在的直线上,如图3,某一时刻,监控可视角度的边界交直线
于点F,交直线
于点E,若连接
,则监控的视野范围为
,设
的面积为y,
,求y与x的关系式,并指出当x为何值时,y有最小值,最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf021aeca0c3cacd4bbffd7479a1e25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3bba5bd11e850c9b766c2ba6c426d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42c17fe4d91d67c1fa43f966bffd891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)如图2,移动
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962fe4f47732b8e6e83d17ff2b9af13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69125a3e5987d13dc1e45a0c2b5c8f58.png)
(3)某校开辟了一块菱形“校园农场”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0c94416b410ffc3216b8e86874ea76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1dd8809233c90f66563c34f2164415.png)
您最近一年使用:0次
2024-03-26更新
|
209次组卷
|
3卷引用:2024年陕西省西安市临潼区中考一模数学试题
5 . 随着乡村振兴战略的不断推进,为了让自己的土地实现更大价值,某农户在屋侧的菜地上搭建一抛物线型蔬菜大棚,其中一端固定在离地面1米的墙体A处,另一端固定在离墙体5米的地面上B点处,现以地面和墙体为x轴和y轴建立坐标系,已知大棚的高度y(米)与地面水平距离x(米)之间的关系式用
表示.将大棚正面抽象成如图所示图形,已知抛物线对称轴为直线
,结合信息回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/af7d0875-3ead-469a-81f2-e6b02bd70b18.png?resizew=151)
(1)求抛物线的解析式:
(2)该农户准备在抛物线上点C(不与A,B重合)处,安装一直角形钢架
对大棚进行加固(点D在x轴上,点E在
上,且
轴,
轴),若忽略接口处的材料损耗,使钢架
总长度
与
之和最大,该农户需要准备多少米钢材?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929925842ca723b34647ccaa596cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/af7d0875-3ead-469a-81f2-e6b02bd70b18.png?resizew=151)
(1)求抛物线的解析式:
(2)该农户准备在抛物线上点C(不与A,B重合)处,安装一直角形钢架
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2977ae4bfa32de8c6f0fb136205c4fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa86d02ee9f1f8c86fbd699cc441cc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9d7e8b9ea80aed3cb436e830e08f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2977ae4bfa32de8c6f0fb136205c4fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
6 . (1)如图1,在
中,
,
,
.
与
、
两边分别相切于点E,F,圆心O恰好在
上,求
的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/3cfb0b89-eaf5-4197-be57-224ae2a9ee4a.png?resizew=166)
(2)已知某文创园区原有一块草坪(
区域)如图2所示,经测量:
,
,在M处建有一个亭子,满足
.现要在原基础上扩大面积重新规划为花卉展区,要求在
上找一点P,连接
并延长到点D,使得
,过点P分别作
于E,
于F.按设计要求,四边形
区域为游客观赏区,其余部分为花卉展区(
、
、
三部分总和).为了游客得到更好的体验,需要尽可能把花卉展区布置大一些,请问能否将花卉展区面积设计最大?若可以,请求出最大面积;若不可以,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/3cfb0b89-eaf5-4197-be57-224ae2a9ee4a.png?resizew=166)
(2)已知某文创园区原有一块草坪(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21de382f8bc3f51527a866701022a754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c99b3e4e4e3200e0e6aef0af2a0112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b686b84b7a2b8e2326dbb88af5e855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d603566c74b1d5de510a2e8f7859010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97136ba3d3ffd4c48a50d69ea502d707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e488c00f4ef96956e2a7a1fdbded624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150fe3137f76a6f05d9148c7d8c1810e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/4c4d45ed-06c5-4b7a-bde5-e97393791eb8.png?resizew=150)
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2024-02-26更新
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71次组卷
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2卷引用:陕西省西安市西北工业大学附属中学2023-2024学年九年级上学期期末数学试题
名校
7 . 蔬菜大棚是一种具有出色的保温性能的框架覆膜结构,它的出现使得人们可以吃到反季节蓅菜.一般蔬菜大棚使用竹结构或者钢结构的骨架,上面覆上一层或多层保温塑料膜,这样就形成了一个温室空间.如图,某个温室大棚的横截面可以看作矩形
和抛物线
构成,其中
,
,取
中点
,过点
作线段
的垂直平分线
交抛物线
于点
,若以
点为原点,
所在直线为
轴,直线
为
轴建立如图所示的平面直角坐标系.如图
,已知抛物线
的顶点为
,请回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/887c16e3-567a-4a6d-b21f-586b28237d8f.jpg?resizew=354)
(1)求该拋物线的表达式;
(2)如图
,为了保证蔬菜大棚的通风性,该大棚要安装两个大小一样的正方形孔的排气装置
,
(
,
,
,
在线段
上,
,
在抛物线上),若要保证两个正方形装置的间距
,求正方形排气装置的边长
的长.(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2de0126c416995c7d2c43ca1bd114c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb378df170f5a3badff58470c13fc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779b089f2ffedebbc9950ab9616993e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/887c16e3-567a-4a6d-b21f-586b28237d8f.jpg?resizew=354)
(1)求该拋物线的表达式;
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1474be3f65ff7d33abdf5da0ed97a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1840e6835b43c58244cde9f70f0a0009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae503a9c3a69764fd80529ce13a58f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2dce07491c3e53410375b50733fb7e.png)
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8 . 某体验馆建造了一幢“森林”主题场馆,如图是馆内抛物线形模拟洞穴的横截面,现需要在洞穴内壁架设平行于地面的钢架
,两端分别在洞穴最高点两侧.在钢架正下方隔离出一片矩形区域
,且
在水平地面上.如图,以O为坐标原点、水平地面为x轴建立平面直角坐标系,抛物线与x轴相交于O、E,经测量
长8米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/25a574f2-41bd-4661-85c5-d2134f3f807c.png?resizew=194)
(1)若
在抛物线上,求该抛物线表达式.
(2)在(1)的条件下,若隔离区矩形区域
的高
米,则隔离区的面积为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/25a574f2-41bd-4661-85c5-d2134f3f807c.png?resizew=194)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82910aff0ebddfd9367110c166a41b3c.png)
(2)在(1)的条件下,若隔离区矩形区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d99524b56d42b8d48c90a9cf78da0e.png)
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9 . 【问题探究】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/ec3286cd-9051-4f7d-906c-3f1e67b844a1.png?resizew=290)
(
)如图
,已知线段
,将线段
绕点
顺时针旋转
得到线段
,连接
,在线段
上取一点
,使
,延长
至点
,使
,连接
.求
的值及
的面积;
【问题解决】
(
)某市为保护生态环境,方便市民观光游览,准备在某地修建一处“和谐观光园”,其形状为菱形
,如图
所示.在菱形
中,
,实际长度
公里,根据用地需求,需在
上确定点
,
上确定点
,将五边形
作为特色植物繁育区,
作为花展示区.根据设计要求,
公里,为使花卉展示区容纳更多的游客,要求花卉展示区
的面积尽可能的大,请问这样的
是否存在?若存在,请求出
面积最大时点
到点
的距离及
面积的最大值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/ec3286cd-9051-4f7d-906c-3f1e67b844a1.png?resizew=290)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90be20bb5f3617017cc6980646074d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74a61581d965458316280968241e4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19741eaa3714f1b8fb7345d3cd7300d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c71349fa485f9107205498af09fd143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
【问题解决】
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb34d6d26481113c0ac4af0366f72e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6052b7c9c6232ef6adf3885c58e6d178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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10 . 综合与实践:“如果一条直线将一个三角形的周长分成相等的两部分,那么这条直线就叫做这个三角形的等周线”.如图,在
中,
,
,
,点
,
分别在边
和
上,且直线
是
的等周线.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/896ee1cc-9df4-4559-b46c-c2a6c6649b36.png?resizew=179)
(1)
的周长为________.
(2)若设
,求
的面积S与x的函数关系式.
(3)在(2)中,
的面积
是否有最大值?若有,求出此时
的长;若没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/896ee1cc-9df4-4559-b46c-c2a6c6649b36.png?resizew=179)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a39d728c8d241ceb1e1f84eb53b28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)在(2)中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
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