1.
收益c=pQ=50p-5p^2
边际收益c'=dc/dp=50-10p
Q=20,20=50-5p
p=30/5=6
边际收益c'=-10
2.
p=2,Q=50-5*2=40
p=5,Q=50-25=25
p=6,Q=20
p=2,需求价格弹性E=(40-25)/(5-2)=5,
p=5,需求价格弹性E=(25-20)/(6-5)=5
1.
收益c=pQ=50p-5p^2
边际收益c'=dc/dp=50-10p
Q=20,20=50-5p
p=30/5=6
边际收益c'=-10
2.
p=2,Q=50-5*2=40
p=5,Q=50-25=25
p=6,Q=20
p=2,需求价格弹性E=(40-25)/(5-2)=5,
p=5,需求价格弹性E=(25-20)/(6-5)=5