[商管] [經濟]-消費者均衡探討

[afoh (afoh)]

Janet consumers two commodities X and Y. Her utility function is
 min{X+2Y, Y+2X}. She choose to buy 10 units of goods X and 20
units of good Y.The price of good X is 1. Which of the following is ture?
a. Icome is 40
b. Icome is 50
c. Icome is 30
d. Icome is 20

答案是D

解釋為 X=10<Y=20 → U=Y+2X →M=20

但是我還是看不懂
因為X<Y 所以選出了U=Y+2X 的效用函數但是如何求出所得的勒?
希望有高手可以替我解答?


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推 hchs31705:有效用含數之後Ux/Uy=Px/Py 這樣?
推 ha18:若x+2y>y+2x會選y+2x，移項出來y>x合，另外一邊會不合。