MC=TC'(Q)=6QTotal Revenue=P*Q=100Q-2Q²MR=TR'(Q)=100-4Q当均衡时,MR=MC,即6Q=100-4Q,解得Q=10,P=80盈利为TR-TC=(100*10-2*10²)-(100+3*10²)=400
解.依题可得MR=10-6Q;MC=TC'=2Q+2利润最大时有MR=MC即10-6Q=2Q+2解得Q=1P=10-3=7利润=PQ-TC=1*7-(1+2)=4