. , , .
, . , , , , (IQ, - , - ). , , . (Marginal Rate of Technical Substitution, MRTS).
MRTS , , : MRTSLK= dK/dL=K'(L). 5.3 ( ), ( ). (Δ= 2 1) (ΔL = L2 L1), .
, MRTS : MRTSKL= dL /dK = L'(K).
. Q = 10KL. 5 . , Q = 500 . .
. Q = 10*K*L = 500
K = 500/L = 50*L-1
MRTSLK = K'(L) = (50*L-1)' = -50* L-2
L = 5, MRTSLK = -50/25 = -2.
: () 2 , , 2 .
(). , :
L = 6 . MRTS LK= 50/36 = 1,39;
L = 7 . MRTS LK= 50/49 = 1,02;
L = 10 . MRTS LK = 50/100 = 0,5.
MRTS LK , ( 5.3). MRTS , .
, , , , . , . , , .
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. : + PLL < ,
, PL - ; , L - ;
(total cost) .
, : PkK + PLL = TC K = TC/Pk (PL/Pk)*L. , : y=a+bx, b . , PL/Pk.
(. 5.5) , .
, , (. 5.6). -, , -, , : MRTS LK = PL/PK.
MRTS . . , . : MPL/PL = MPK/PK. , , .
, (. 5.7).
, , . 5.7? ?
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22. XIX
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