请问一道英语数学题的答案?
A rectangular box without a lid has volume 0.5 cubic metres.Find the minimum surface area.
请问答案是什么?
人气：123 ℃ 时间：2020-04-02 08:18:29
解答
设底边正方形边长为a,箱子高h
a^2*h=0.5,
表面积=4*ah+a^2=2/a+a^2>=3
最小表面积为3
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