19-20高二下·江苏苏州·期中
名校
解题方法
1 . 如图所示,某镇有一块空地
,其中
.当地政府计划将这块空地改造成一个旅游景点,拟在中间挖一个人工湖
,其中
都在边
上,且
,挖出的泥土堆放在
地带上形成假山,剩下的
地带开设儿童游乐场.为安全起见,需在
的周围安装防护网.设
.
![](https://img.xkw.com/dksih/QBM/2021/3/11/2675705267904512/2676338543640576/STEM/a3df37ce-ea14-4944-80d0-5973eac8a189.png)
(1)当
时,求
的值,并求此时防护网的总长度;
(2)若
,问此时人工湖用地
的面积是堆假山用地
的面积的多少倍?
(3)为节省投入资金,人工湖
的面积要尽可能小,问如何设计施工方案,可使
的面积最小?最小面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748adca7118689bffd79ce7666c90b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c3fe26b378cb2665c06c5d8039d675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2b5e712b42f748a3c30bb5d160c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c29e963e1871b415c086bc600d16bd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb35158a52a23a6e57ff890cef8c7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/3/11/2675705267904512/2676338543640576/STEM/a3df37ce-ea14-4944-80d0-5973eac8a189.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8a5801b87418e955e5d8b5f785b090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9f94c98de139b7455211d96df0a668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
(3)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
您最近一年使用:0次
2021-03-12更新
|
1205次组卷
|
7卷引用:福建省福州市鼓楼区福州黎明中学2022-2023学年高一下学期期中数学试题