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解题方法
1 . 某公园有两块三角形草坪,准备修建三角形道路(不计道路宽度),道路三角形的顶点分别在草坪三角形的三条边上.
(1)第一块草坪的三条边
米,
米,
米,若
,
(如图),
区域内种植郁金香,求郁金香种植面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/89bddf23-96ca-4579-8296-a29fe77df80e.png?resizew=178)
(2)第二块草坪的三条边
米,
米,
米,M为PQ中点,
(如图),
区域内种植紫罗兰,求紫罗兰种植面积的最小值.
(1)第一块草坪的三条边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23e756d10fd459bf5359b756b6c094d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee350dfab7eed63004ad6f1c04830d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2f892a652efbfff1de7dac42e977e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843de723259417d5661fbc770ee23c9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8daff96303a07819bd4ee47731e73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/89bddf23-96ca-4579-8296-a29fe77df80e.png?resizew=178)
(2)第二块草坪的三条边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c38fe1252b0368cef4f004a0660bd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfebceb36a1089beef8e48dfbcf306d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae52a1e606f1f1b87b9b5f5c52ef47dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e5598e565e0ebf21cc9850d8f15e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e4f9a9fd59ac8fde1cd5e456003e10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/b0ca7595-73fd-44a7-bf52-e8095bf510e9.png?resizew=193)
您最近一年使用:0次
2023-03-19更新
|
735次组卷
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7卷引用:重庆市南开中学校2020-2021学年高一下学期期末数学试题
重庆市南开中学校2020-2021学年高一下学期期末数学试题云南省昆明市第三中学2021-2022学年高一下学期期中数学试题新疆乌鲁木齐市第七十中学2021-2022学年高一下学期期中考试数学试题宁夏回族自治区银川一中2023届高三第一次模拟考试数学(文)试题宁夏回族自治区银川一中2023届高三第一次模拟考试数学(理)试题(已下线)模块三 专题7 大题分类练(三角恒等变换)基础夯实练(北师大版)(已下线)模块三 专题5 大题分类练(三角恒等变换)基础夯实练(苏教版)
名校
2 . 已知函数
,
(其中
,
,
)的图象与
轴的交点中,相邻两个交点之间的距离为
,且图象上一个最高点为
.
(1)求
的解析式;
(2)先把函数
的图象向左平移
个单位长度,然后再把所得图象上各点的横坐标伸长到原来的2倍(纵坐标不变),得到函数
的图象,试写出函数
的解析式.
(3)在(2)的条件下,若存在
,使得不等式
成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93778ac16acb542c259b9c4c49b410b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae7bdbc3dca4c8e4a06f4bea3a7f20c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)先把函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
(3)在(2)的条件下,若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f72ab73187a21c812c28a9f3a8be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8c88b4e259843fe8a35a4461b2a494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-01-20更新
|
656次组卷
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3卷引用:重庆市北碚区2019-2020学年高一上学期期末数学试题