1 . 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
|
1428次组卷
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3卷引用:湖南省株洲市第二中学2023-2024学年高三下学期开学考试数学试卷
2 . 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
3 . 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