P=250-3(Q)^(1/2)
dP/dP=1=(3/2)Q^(-1/2) dQ/dP
Q=(250-P)^2/9
价格弹性系数 (P/Q)dQ/dP=(2/3)Q^(1/2)*P/[(250-P)^2/9]
=6 P(250-P)/(250-P)^2
=6*40/(250-40)
=8/7=1 1/7
P=250-3(Q)^(1/2)
dP/dP=1=(3/2)Q^(-1/2) dQ/dP
Q=(250-P)^2/9
价格弹性系数 (P/Q)dQ/dP=(2/3)Q^(1/2)*P/[(250-P)^2/9]
=6 P(250-P)/(250-P)^2
=6*40/(250-40)
=8/7=1 1/7