Q=2400-400P求:(-dQ/dP)*(P/Q)=?特别是:-dQ/dP的求导过程!
问题描述:
Q=2400-400P求:(-dQ/dP)*(P/Q)=?特别是:-dQ/dP的求导过程!
答
dQ/dP即Q对P求导,直接运用求导公式就可以了:
Q'=(2400-400P)'=2400'-(400P)'=0-400=-400
∴-dQ/dP=400
P/Q=P/(2400-400P)
∴-(dQ/dP)*(P/Q)=P/(6-P)