suppose that we have two frims that face a linear demand curve  p(Y)=a-bY , and have constant mariginal costs,c, for each firm. Solve for the Cournot equilibrium output.

假定有两个厂商，他们面临的线性需求曲线是：p(Y)=a-bY， 每家厂商的边际成本都不变，为C，求古诺均衡中的产量。。





答案给的是：in equilibrium each firm will produce (a-c) / 3b，so the total industry output is 2(a-c) / 3b..


不知道怎么做出来的。

求各位大侠点拨！！！！