Question: ODE,problem:division by zero, why?

I want to solve an ODE from Game Theory, the Cournot competition.

It says


 where, I think,

' means diff(,q1),

c2(q2)=c*q2 for a fixed c in [0,1]



So c2,p and r2 are functions.r2 goes from [0,inf) to [0,inf).

I look for r2, which should be r2(q1)=(1-q1-c)/2 when correctly solved.

However, the command dsolve says Error in dsolve (divison by 0).

 What is wrong? How do I obtain the solution for r2 in Maple?


Please Wait...