Wii Fit價格? - Switch
By Olivia
at 2007-12-09T00:17
at 2007-12-09T00:17
Table of Contents
※ 引述《alwaysOGC (一期一會)》之銘言：
: 請問現在地下街Wii fit破了3500關卡了嗎?
: 網路上還是4000左右...
: 有點想要衝了..ˋ(′_‵||)ˊ
今天新竹3800，忍不住就衝了...這不是重點
路上想到社會行為分布為exp函數....假設最高價為4800，最低價為2500
則價格函數為 price = 2300*exp(-a*T)+2500
以現在均價為3600來看，a=ln(2300/1100)/7 =0.11
假設目標價為3000，大概還要等 7 天....看來下個週末就會降到3000...
此函數會因最低價假設不同而改變，有興趣可以自己代入算算看囉
--
: 請問現在地下街Wii fit破了3500關卡了嗎?
: 網路上還是4000左右...
: 有點想要衝了..ˋ(′_‵||)ˊ
今天新竹3800，忍不住就衝了...這不是重點
路上想到社會行為分布為exp函數....假設最高價為4800，最低價為2500
則價格函數為 price = 2300*exp(-a*T)+2500
以現在均價為3600來看，a=ln(2300/1100)/7 =0.11
假設目標價為3000，大概還要等 7 天....看來下個週末就會降到3000...
此函數會因最低價假設不同而改變，有興趣可以自己代入算算看囉
--
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