If market inverse demand is pQ a bQ and the firm produces
     If market inverse demand is p(Q) = a - bQ and the firm produces according to C(Q) = cQ + dQ^2, determine the firm\'s optimal quantity, price and profit level. (Assume that a, b, c, d > 0.) What conditions on b and d must hold in equilibrium? 
  
  Solution
For equilibrium, MR = MC
Price = a-bQ
MR = a-2b
MC = c+2d
a-2b = c+2d
a-c = 2b+2d
a-c = 2(b+d)

