Market equilibrium q=D(p)=a-bps>p a-a D(q), b the equation of the inverse market demand curve, And q=S(P)=c+dp分p -C+q-s(a d the equation of the inverse market supply curveMarket Equilibrium q D p a bp p a q b = = −  = D q − = − ( ) ( ), 1 q S p c dp p c q d = = +  = S q − + = − ( ) ( ), 1 the equation of the inverse market demand curve. And the equation of the inverse market supply curve