小雯 asked in 教育與參考考試 · 2 decades ago

Q=12-0.25P 怎麼求 MR ?

請問有誰會 在商品需求曲線:Q=12-0.25P 求 MR ?

3 Answers

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  • 2 decades ago
    Favorite Answer

    需求曲線斜率除以二:Q=12-0.125P

    圖解:縱座標[Q數量],橫座標[P價格]

    需求曲線為(0,12),(48,0)連線之斜直線:斜率為-0.25

    MR線為(0,12),(96,0)連線之斜直線:斜率為-0.125

    2006-04-07 22:20:28 補充:

    需求曲線:Q=12-0.25P [需求曲線]需求曲線斜率除以二:Q=12-0.125P [MR曲線]

  • 1 decade ago

    1、最佳解的答案有問題,如果MR=Q=12-0.125P→MR=96-8Q則此選擇題沒

    有這個選項!

    2、TR=48Q-4Q^2 ,MR=dTR/dQ=48-8Q ,計算過程錯誤,

    何以TR/Q會出現8Q

    我猜測題目會這樣問,大概是不完全競爭市場下!

    因為在完全競爭市場下,AR=MR=Q,答案很快就出來!

    而不完全競爭市場下,Q=AR=2MR,12-0.25P=2MR,所以MR=48-8Q

  • 2 decades ago

    Q=12-0.25P =>P=48-4Q

    TR=PQ =>TR=(48-4Q)Q =>TR=48Q-4Q^2

    MR=dTR/dQ=48-8Q

    Source(s): 經驗
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