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长方形周长固定长宽比例多少时面积最大
更新时间: 2021-04-07 03:08:43  

1、长方形的周长:(长+宽)=2(一定) 长方形的周长随着它的长和宽的变化而变化,但比值一定。所以是对的。

2、长方形面积S=ab(a、b分别为长、宽)

a:b=1≥m>0

则a=mb

则S=mb2

则此题转化为:m(0

关键词: 长方形 周长 固定 比例 少时 面积

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