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D (D = AR).
(MR) (): MR < , MR D:
MR = dTR/dQ = d(P*Q)/dQ = P*dQ/dQ + Q*dP/dQ;
MR = P + Q*dP/dQ;
Q*dP/dQ < 0, MR < .
R P :
= b*Q; TR = *Q b*Q2; R = 2b*Q
R: TR = зQ = 1 = . , 䒺 , .
: Q = 10000 , = 400 .. Q 1 0,01 .., , 399,99 .., .
MR = 399.9910001 400.1000 = 300 ..
=MR, MR < . MR .
R = + Q(d / dQ) = P + (Q / P)(d / dQ)P = P(1+1 / D)
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ij dd . , MR < 0, TR . , .
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