Authors: ABBAS NAJATI
Abstract: In this paper, we obtain the general solution and the generalized Hyers--Ulam--Rassias stability for a cubic functional equation f(mx+y)+f(mx-y)=mf(x+y)+mf(x-y)+2(m^3-m)f(x) for a positive integer m \geq 1.
Keywords: Hyers--Ulam--Rassias stability, Quadratic function, Cubic function
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