解题方法
1 . 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)
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