The perimeter of a rectangle is 72m. What are its dimensions that_数学解答

The perimeter of a rectangle is 72m. What are its dimensions that yield the maximum area?

人气：153 ℃　时间：2020-02-03 09:38:22

解答

矩形周长为72cm,当长为多少时面积最大?
当其为正方形时,即长=宽=18cm时 Smax=18*18=324cm(平方厘米)如果用导数方法，那要怎麼做？用导数。饶了我吧。早就还给老师喽。呵呵anyway，你还是解答得很好