垄断厂商在短期内均衡的条件是SMC=MRSMC=STC'=0.3Q^2-12Q+140TR=PQ=150Q-3.25Q^2 MR=TR'=150-6.5Q0.3Q^2-12Q+140=150-6.5Q解得Q=20故P=85
MC=TC'=8+0.1qMR=20-0.1qMR=MC8+0.1q=20-0.1qq=60 p=17利润π=pq-tc=60*17-8*60-0.05*60^2=360
