We analyze the competition of two firms with increment function of the first firm c(x) = kx +1 an analogue to that in [1] with the increment c = 1.
The optimal strategies X*, Y* and the value v of the game in explicit form are obtained, their parameters a, α, C0, C1 being the solutions of the equation system.
The values of the game parameters for various k are presented in graphic form.
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