※ 引述《chenemily (天天保持好心情)》之銘言：
: The interior of a rectangular carton is designed by a certain manufacturer to
: have a volume of x cubic feet and a ratio of length to width to height of 3 :
: 2 : 2. In terms of x, which of the following equals the height of the
: carton, in feet?
: 請問一下 這題我令長寬高:3K:2K:2k
: 體積 X=3K*2K*2K=12K^3
: 最後一句是什麼意思 該怎麼算
: 謝
: 答案是 根號3次方2X/3
1. X=12K^3 => K^3=X/12 => K=(X/12)^(1/3)
2. 高=2K=2*(X/12)^(1/3)=(8*X/12)^(1/3)=(2X/3)^(1/3)
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※ 編輯: hao 來自: 1.164.212.55 (07/10 23:23)