名校
解题方法
1 . 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
|
535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
2 . 高铁的建设为一个地区的经济发展提供了强大的推进力,也给人们的生活带来极大便捷.以下是2022年开工的雄商高铁线路上某个路段的示意图,其中线段
、
代表山坡,线段
为一段平地.设图中
坡的倾角满足
,
长
长
长
.假设该路段的高铁轨道是水平的(与
平行),且端点
分别与
在同一铅垂线上,每隔
需要建造一个桥墩(不考虑端点
建造桥墩)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/c74f6394-8bbb-41cf-9c85-b0607eb123fd.png?resizew=200)
(1)求需要建造的桥墩的个数;
(2)已知高铁轨道的高度为
,设计过程中每
放置一个桥墩,设桥墩高度为
(单位:
),单个桥墩的建造成本为
(单位:万元),求所有桥墩建造成本总和的最小值.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e731b605eba332df44bea683c4aee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27db0d05bd138ad752b4cddc2e3bed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8392f26db20adb474c5e7673036fe3d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4ef601f9b9db4f7fb5f0b0dd2e0a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617b624dd6e80853ea8dda1b5591cdd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed8f425894336757c6feb514a884fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4ee159aea403220848b14b8e81dc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/c74f6394-8bbb-41cf-9c85-b0607eb123fd.png?resizew=200)
(1)求需要建造的桥墩的个数;
(2)已知高铁轨道的高度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ec72d07385ed62ec9540083958be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1369d3503abf9bfcbdab0d6a4717017c.png)
您最近一年使用:0次
2023-03-06更新
|
1407次组卷
|
3卷引用:上海市2023届高三模拟数学试题
名校
3 . 如图,某生态农庄内有一直角梯形区域
,
,
,
百米,
百米.该区域内原有道路
,现新修一条直道
(宽度忽略不计),点
在道路
上(异于
,
两点),
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/871fbe40-f443-44da-b62f-16a5b986724b.png?resizew=181)
(1)用
表示直道
的长度;
(2)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2万元,种植经济作物的成本为每平方百米1万元,新建道路
的成本为每百米1万元,求以上三项费用总和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.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/954d2fd2aecd31ff67d975bc8981023a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59711bd8b634ea563537f34ed82c562f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/871fbe40-f443-44da-b62f-16a5b986724b.png?resizew=181)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
(2)计划在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
您最近一年使用:0次
4 . 某公司为实现利润目标制定奖励制度,其中规定利润超过10万元且少于1000万元时,员工奖金总额y(单位:万元)随利润x(单位:万元)的增加而增加,且奖金总额不超过5万元,则y关于x的函数可以为( )(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ea2320b939ede0c6332aaf5ca1b484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e3be810161f55a35eb94c92fb29c34.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 如图,某居民区内有一直角梯形区域
,
,
,
百米,
百米.该区域内原有道路
,现新修一条直道
(宽度忽略不计),点
在道路
上(异于
,
两点),
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/250e5087-c99e-40b3-9758-08298d1b8c5e.png?resizew=191)
(1)用
表示直道
的长度;
(2)计划在
区域内修建健身广场,在
区域内种植花草.已知修建健身广场的成本为每平方百米4万元,种植花草的成本为每平方百米2万元,新建道路
的成本为每百米4万元,求以上三项费用总和的最小值(单位:万元).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.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/954d2fd2aecd31ff67d975bc8981023a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59711bd8b634ea563537f34ed82c562f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/250e5087-c99e-40b3-9758-08298d1b8c5e.png?resizew=191)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
(2)计划在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
您最近一年使用:0次
6 . 如图,某公园内有两条道路
,
,现计划在
上选择一点
,新建道路
,并把
所在的区域改造成绿化区域.已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/d0584c0e-c7f5-4e6b-a398-85fe294e6f2e.png?resizew=175)
(1)若绿化区域
的面积为1
,求道路
的长度;
(2)若绿化区域
改造成本为10万元/
,新建道路
成本为10万元/
.设
(
),当
为何值时,该计划所需总费用最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853b60fafb31cab8f1bec5510bf1c984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce89b633e5d6bcf9406e3f9208fe06d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/d0584c0e-c7f5-4e6b-a398-85fe294e6f2e.png?resizew=175)
(1)若绿化区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01486eeae6fb8e1f12103690ecfc87ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若绿化区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01486eeae6fb8e1f12103690ecfc87ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce89b633e5d6bcf9406e3f9208fe06d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01dcbd171693a47c5b932a5e84de10c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c7e1e7cafe85ea6fd38d7ee627062b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2019-01-30更新
|
836次组卷
|
3卷引用:【市级联考】江苏省徐州市(苏北三市(徐州、淮安、连云港))2019届高三年级第一次质量检测数学试题