, , , , , , 㳿. , . . , . .
. (total fixed costs F) , ( , , , , ). (total variable costs V) , ( , , , ).
.
(average total costs - ) , , .
TC
ATC = Q
(F) (V).
:
TFC
AFC = Q
, .
.
TVC
AVC = Q
, .
, .
Δ TC ΔTVC
MC = ΔQ = ΔQ
:
d TC d TVC
MC = dQ = dQ
V ( 1) , = 0, V = 0. . , 䳺 ( , ). F , . = 0, F = . .
. . , , . .
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F ( 2) , . , ∙ = F, .
V ( 3) . ( ). V , . ̳ , .