Inverse demand P=1−q1−q2P = 1 - q_1 - q_2P=1−q1−q2; cost ci(qi)=κiqic_i(q_i) = \kappa_i q_ici(qi)=κiqi, κi∈(0,1)\kappa_i \in (0,1)κi∈(0,1). Find firm 2's Cournot equilibrium profit.
(1−κ1+κ2)2/9(1 - \kappa_1 + \kappa_2)^2 / 9(1−κ1+κ2)2/9
(1−κ2+κ1)2/9(1 - \kappa_2 + \kappa_1)^2 / 9(1−κ2+κ1)2/9 \quad [i.e.\ (1−2κ2+κ1)2/9(1 - 2\kappa_2 + \kappa_1)^2/9(1−2κ2+κ1)2/9 corrected below]
(1−2κ1+κ2)2/9(1 - 2\kappa_1 + \kappa_2)^2 / 9(1−2κ1+κ2)2/9
(1−2κ2+κ1)2/9(1 - 2\kappa_2 + \kappa_1)^2 / 9(1−2κ2+κ1)2/9
