作者hccj0914 (jacktsai)
看板trans_math
标题[微分] 经济数学题
时间Tue Jun 29 10:41:19 2010
when the price of a certain commodity is p dollars per unit , consumer demand
x hundred units of the commodity , where
75x^2 + 17p^2 = 5300
how fast is the demand x changing with respect to time when the price is $7
and is decreasing at the rate is 75 cents per month ?
这是政大企管去年转学考第一题
看了很久不知道要怎下手
一来是看不懂他在问什麽...
谢谢帮忙>O<"
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