为了美化城市环境,提高市民的精神生活,市政府计划在人民广场一块半径为10米的圆形空地进行种植花草绿化改造.规划如图所示,在中央正六边形区域和六个相同的矩形区域种植鲜花,其余地方种植草地.设
,正六边形的面积为
,六个矩形的面积和为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9e995de3-c2fe-42af-a45b-c51366f514eb.png?resizew=140)
(1)用
分别表示区域面积
,
;
(2)求种植鲜花区域面积的最大值.
(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c491961dac15b5c1f7b0797d0344a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9e995de3-c2fe-42af-a45b-c51366f514eb.png?resizew=140)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)求种植鲜花区域面积的最大值.
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6038f6af2bcaf4cc051831aa46170bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e8336b576be557128b021815eb481a.png)
更新时间:2021-01-28 20:19:21
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【推荐2】现有一块大型的广告宣传版面,其形状是右图所示的直角梯形
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