※ 引述《yamitigo (鸭米铁剑)》之铭言： : 学校:FCU : 教师:吴朝钦 : 科目:经济学 : 题目: : Marginal cost equals: : (i) change in total cost divided by change in quantity produced △TC MC = ------ ，在微量变动时， MC = dTC/dQ △Q : (ii) change in variable cost divided by change in quantity produced TC = TVC + TFC dTC/dQ = d(TVC+TFC)/dQ = dTVC/dQ + dTFC/dQ 然後dTFC/dQ 会等於0 所以 dTC/dQ = dTVC/dQ : (iii) the avarege fixed cost of th current unit : (A) (i) and (ii) : (B) (ii) and (iii) : (C) (i) only : (D) All of the above are correct. : 我的想法: : 我个人觉得是(C) : 但是答案却是(A) : 因为边际成本的话 : 不是应该△Total Costs/△Quantity才对吗?? : 还有请各位了..... --

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