大侠们帮我看看这个题怎么做啊?

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<P>consider an industry with the following structure. there are 50 firms that behave in a competitive manner and have identical cost functions given by c(y)=y^2/2. There is one monopolist that has 0 marginal costs. the demand curve for the product is given by <BR>D(p)=1000-50p.<BR>(a) what is the monopolist's profit-maximizing output?<BR>(b) what is the monopolist's profit-maximizing price?<BR>(c) how much does the competitive sector supply at this price?</P>

<P>告诉我一下怎么解谢谢,或者把答案直接发到<a href="mailto:super_baosss@126.com" target="_blank" >super_baosss@126.com</A> </P>
<P>谢谢啊!</P>

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关键词：怎么做 competitive MONOPOLIST Maximizing Functions following structure industry product demand

很简单的 ，你看看课本上的题目就会了，更本就没有难度，朋友

Competitive firms:C=0.5Qc^2 MC=Qc=MR=P

Monopolist:

Demand curve:Qm=D(P)-50Qc=1000-50P-50P=1000-100P

P=10-0.01Qm MR=10-0.02Qm=MC=0

(1)(2)Qm=500 P=5

(3)50Qc=50P=250

这是博弈中的一种定价法，自己去查查吧

用英语写出来好像是高深点，其实就基础吗