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[数学] 陳向東數學第三章第26題 解答不是很懂

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发表于 2015-9-24 13:18:43 | 显示全部楼层 |阅读模式
A certain company has found that the number c laber hours required to produce x items is directly proportional to the square root of x. if 3 labor hours are required to produce 20 items. How many labor hours are required to produce 40 items?


这题解答说
c 和x的函数关系是 c = k * sqrt(x);


请问k是哪里来的呢?


谢谢~











发表于 2015-10-8 07:58:53 | 显示全部楼层
It comes from the word "proportional".
 楼主| 发表于 2015-10-20 18:11:10 | 显示全部楼层
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