In this paper, we discuss the Hyers-Ulam stability of mixed-type additive-cubic Jensen functional equation {align*} 2F(2u+v/2)+2F(2u-v/2)=1/4[F(u+v)+F(u-v)]+3F(u) {align*} in non-Archimedean (n, β) normed spaces.
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Sankar et al. (2024) studied this question.
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