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1 paper
M. Eshaghi Gordji, M. Bavand Savadkouhi, Th. M. Rassias
In this paper, we prove generalized Hyres--Ulam--Rassias stability of the mixed type additive, quadratic and cubic functional equation $$f(x+ky)+f(x-ky)=k^2f(x+y)+k^2f(x-y)+2(1-k^2…