,短期資本量為 K =1,工資率為 w = 5,資本租金為
r = 5。
TC=R*K+W*L=5+5L
代入L=Q2/25
=>TC=5+Q2/5
AVC=TVC/Q=Q/5
SAC=TC/Q=5/Q+Q/5
SMC=dSTC/dQ=0.2Q*2=0.4Q
Q = 5K*L1/2
短期K固定,K代1,Q = 5*L1/2
STC = PL * L + PK * K
=5* (Q/ 5)2 + 5 * 1
= Q2/5 + 5
TVC= Q2 /5 , AVC = Q /5
SAC = Q/5 + 5/Q
SMC = 2Q/5 = 0.4Q
回3F
STC對Q做微分
SMC=dSTC/dQ=0.2Q^2
將平方的2移下來*0.2,就等於答案 0.4Q 啦
SMC=dSTC/dQ=0.2Q*2=0.4Q
求上敘解