Anonymous
Anonymous asked in 科學數學 · 8 years ago

一道關於效用函數的題目

圖片參考:http://imgcld.yimg.com/8/n/AF03652609/o/1511110603...

我不太懂效用函數是什麼意思.........請大大們幫忙解惑!><

Update:

可否再請問,MUx/MUy是什麼意思?MU是什麼意思?

Update 2:

那麼Dy/Dx呢?

1 Answer

Rating
  • 小白
    Lv 7
    8 years ago
    Favorite Answer

    Px及Py各代表物品的單價,Px = 20,Py = 40

    達到消費者均衡時,MUx/MUy = Dy/Dx = Px/Py,此時有最大效用,

    ==> Y / X = 20 / 40 = 1 / 2

    ==> X = 2Y

     

    每月花費上限為800元,20X + 40Y = 800 ==> X + 2Y = 40

     

    X = 2Y 代入,得 Y = 10,X = 20

     

    最適組合:啤酒20,花生米10

     

     

    2011-11-06 21:10:57 補充:

    MUx = Marginal Utility of x ==> x 的邊際效用

    MUy = y 的邊際效用

    2011-11-06 22:17:19 補充:

    Dx預算線對x微分,預算線 = 20x + 40y - 800

    Dy預算線對y微分

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