总收益为s=p*q=p*(150-2p^2)=150p-2p^3
总收益变化为ds=(150-6p^2)*dp
总收益变化率为ds/s=(150-2p^2)/(150-6p^2)*(dp/p)
当p=6时,价格下降2%,即dp/p=-2%
则总收益变化率为
ds/s=(150-2*6^2)/(150-6*6^2)*(-2%)
=78/(-66)*(-2%)
=2.36%
∴总收益变化百分比为上涨2.36%
总收益为s=p*q=p*(150-2p^2)=150p-2p^3
总收益变化为ds=(150-6p^2)*dp
总收益变化率为ds/s=(150-2p^2)/(150-6p^2)*(dp/p)
当p=6时,价格下降2%,即dp/p=-2%
则总收益变化率为
ds/s=(150-2*6^2)/(150-6*6^2)*(-2%)
=78/(-66)*(-2%)
=2.36%
∴总收益变化百分比为上涨2.36%