矩形的长度是其宽度的三倍。周长至多112厘米宽度的最大可能值是多少?
所以最大宽度为14cm设长度为L设宽度为w给定L = 3w给定周长max为112 cm => 2L + 2w = 112 As L = 3w“则”2L + 2w = 112“” - >“” 2(3w)+ 2w = 112 => 8w = 112w = 112/8 = 14
所以最大宽度为14cm设长度为L设宽度为w给定L = 3w给定周长max为112 cm => 2L + 2w = 112 As L = 3w“则”2L + 2w = 112“” - >“” 2(3w)+ 2w = 112 => 8w = 112w = 112/8 = 14