Stability of Mixed Type Additive-Cubic Jensen Functional Equation in Non-Archimedean $(n,\beta )$ Normed Spaces

In this paper, we discuss the Hyers-Ulam stability of mixed-type additive-cubic Jensen functional equation \begin{align*} 2$\mathcal{F}$\left(\frac{2u+v}{2}\right)+2$\mathcal{F}$\left(\frac{2u-v}{2}\right)=\frac{1}{4}[$\mathcal{F}$(u+v)+$\mathcal{F}$(u-v)]+3$\mathcal{F}$(u) \end{align*} in non-Archimedean $(n,\beta )$ normed spaces.