解题方法
1 . 如图,某生态农庄内有一三角形区域
,
,
百米,
百米.现要修一条直道
(宽度忽略不计),点
在道路
上(异于
,
两点).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/0dc8c034-6761-471f-9817-2d21b91c6f0a.png?resizew=168)
(1)若
,求
的长度;
(2)现计划在
区域内种植观赏植物,在
区域内种植经济作物.已知种植观赏植物的成本为每平方百米4万元,种植经济作物的成本为每平方百米2万元,新建道路
的成本为每百米2万元,求三项费用总和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6610676353016a9f7235d306b731c1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/0dc8c034-6761-471f-9817-2d21b91c6f0a.png?resizew=168)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a311738db3fc5431d14a0942542a62e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)现计划在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
名校
解题方法
2 . 在新农村建设中,某村准备将如图所示的
内区域规划为村民休闲中心,其中
区域设计为人工湖(点D在
的内部),
区域则设计为公园,种植各类花草.现打算在
,
上分别选一处E,F,修建一条贯穿两区域的直路
,供汽车通过,设
与直路
的交点为P,现已知
米,
,
,
米,
,
段的修路成本分别为100万元/百米,50万元/百米,设
,修路总费用为关于
的函数
,(单位万元),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfaa4beac0c303da8ea298b7effce1fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9680bd6f250acb8b568510419b59d3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731ac94d7d7af196a74d9aa5021cbb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21f808404463c108bea981ca900c15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc513822ba6e34a16a468450ce282b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd7229922fbb3ce09dada883f74fbb1.png)
A.![]() | B.![]() |
C.修路总费用最少要400万元 | D.当修路总费用最少时,![]() |
您最近一年使用:0次
2024-01-07更新
|
537次组卷
|
4卷引用:2024年普通高等学校招生全国统一考试模拟试题数学试题(一)
2024年普通高等学校招生全国统一考试模拟试题数学试题(一)广东省珠海市第一中学2024届高三上学期期末模拟数学试题(三)(已下线)6.4.3 第3课时 余弦定理、正弦定理应用举例【第三练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)解三角形-综合测试卷B卷
名校
解题方法
3 . (1)某厂生产产品
件的总成本
(万元),已知产品单价
(万元)与产品件数
满足:
,生产
件这样的产品单价为
万元.
①设产量为
件时,总利润为
(万元),
的解析式为什么?
②产量
定为多少件时,总利润
(万元)最大?
(2)已知
,求
的值;
(3)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46d555e2f55840784cebc5eeeaba4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f50d583e2d0d5361cc3b99d8b39e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
①设产量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa50c62220434caca5bc663e5a9a327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa50c62220434caca5bc663e5a9a327.png)
②产量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa50c62220434caca5bc663e5a9a327.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f57397e197cfe42f335ff53515d58f.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3854d44da64f5683c3af94248fe121ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
您最近一年使用:0次
解题方法
4 . 如图所示,某海滨养殖场有一块可用水域,该养殖场用隔离网
把该水域分为两个部分,其中
百米,现计划过
处再修建一条直线型隔离网,其端点分别在
上,记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/202a1552-3a79-42a6-a8a6-d5cf97a1412b.png?resizew=170)
(1)若要使得所围区域
面积不大于
平方百米,求
的取值范围:
(2)若要在
区域内养殖鱼类甲,
区域内养殖鱼类乙,已知鱼类甲的养殖成本是
万元/平方百米,鱼类乙的养殖成本是
万元/平方百米.试确定
的值,使得养殖成本最小,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5d2552cd2dd87c8191f5473d439bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f65dbed884e2248ec075655c684aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/202a1552-3a79-42a6-a8a6-d5cf97a1412b.png?resizew=170)
(1)若要使得所围区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6765a87bcc2b6d44aabdee9af73e6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)若要在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6bc20cf084f78b63b9990cf4fa769b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b6f4f9b0fe1c073ae2e085adc26fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
您最近一年使用:0次
5 . 如图,在P地正西方向16km的A处和正东方向2km的B处各一条正北方向的公路AC和BD,现计划在AC和BD路边各修建一个物流中心E和F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/52c88c40-405c-49a7-9a31-7e8d47208270.png?resizew=189)
(1)若在P处看E,F的视角
,在B处看E测得
,求AE,BF;
(2)为缓解交通压力,决定修建两条互相垂直的公路PE和PF,设
,公路PF的每千米建设成本为a万元,公路PE的每千米建设成本为8a万元.为节省建设成本,试确定E,F的位置,使公路的总建设成本最小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/52c88c40-405c-49a7-9a31-7e8d47208270.png?resizew=189)
(1)若在P处看E,F的视角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56762ae1533ff0f2ef8b9db154cb2ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3783ed9a7d67f4a30bd76d369555d6.png)
(2)为缓解交通压力,决定修建两条互相垂直的公路PE和PF,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2259f4e2d30b6a25c85853176ae98e.png)
您最近一年使用:0次
6 . 如图,在
地正西方向
的
处和正东方向
的
处各一条正北方向的公路
和
,现计划在
和
路边各修建一个物流中心
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/59a153db-a5da-49f3-a586-436dfc11116d.png?resizew=178)
(1)若在
处看
,
的视角
,在
处看
测得
,求
,
;
(2)为缓解交通压力,决定修建两条互相垂直的公路
和
,设
,公路
的每千米建设成本为
万元,公路
的每千米建设成本为
万元.为节省建设成本,试确定
,
的位置,使公路的总建设成本最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ca9709995834eb7a656f0f160e55a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa08e0041bef349ec46e48a0800f5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/59a153db-a5da-49f3-a586-436dfc11116d.png?resizew=178)
(1)若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56762ae1533ff0f2ef8b9db154cb2ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3783ed9a7d67f4a30bd76d369555d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)为缓解交通压力,决定修建两条互相垂直的公路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2259f4e2d30b6a25c85853176ae98e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cd7223f1384160818fc1c74544c485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
2019-09-26更新
|
325次组卷
|
2卷引用:江苏扬州高邮市2019-2020高三上学期开学考试数学(理)试题
名校
7 . 为丰富农村业余文化生活,决定在A,B,N三个村子的中间地带建造文化中心.通过测量,发现三个村子分别位于矩形ABCD的两个顶点A,B和以边AB的中心M为圆心,以MC长为半径的圆弧的中心N处,且AB=8km,BC=
km.经协商,文化服务中心拟建在与A,B等距离的O处,并建造三条道路AO,BO,NO与各村通达.若道路建设成本AO,BO段为每公里
万元,NO段为每公里a万元,建设总费用为
万元.
![](https://img.xkw.com/dksih/QBM/2018/10/11/2051196398305280/2055731747856384/STEM/3d6b47d009ba4708b0a5bca4bdc6e7d3.png?resizew=158)
(1)若三条道路建设的费用相同,求该文化中心离N村的距离;
(2)若建设总费用最少,求该文化中心离N村的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827bec361fa9658bc190b57633f2b5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://img.xkw.com/dksih/QBM/2018/10/11/2051196398305280/2055731747856384/STEM/3d6b47d009ba4708b0a5bca4bdc6e7d3.png?resizew=158)
(1)若三条道路建设的费用相同,求该文化中心离N村的距离;
(2)若建设总费用最少,求该文化中心离N村的距离.
您最近一年使用:0次