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Yahoo!奇摩知識+ - 分類問答 - 教育學習 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 教育學習 - 已解決 
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經濟學求彈性?(有效日期2013/11/7)
Nov 5th 2013, 16:01

P=100時，Q=8000，要讓Q增加至Q'=10000，則P'=?
需求彈性=-﹝(Q'-Q)/((Q+Q')/2)﹞/﹝(P'-P)/((P+P')/2)﹞
=-﹝(10000-8000)/((8000+10000)/2)﹞/﹝(P'-100)/((100+P')/2)﹞
=(-2/9)/﹝(P'-100)/((100+P')/2)﹞=2
(P'-100)/((100+P')/2)=-1/9
-9P'+900=(100+P')/2
-18P'+1800=100+P'
19P'=1700
P'=89.47
故售價應訂89.47美元。

參考資料 僅供參考

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