LAUSR

In this article, we study the stability of various forms for the general octic functional equation ${{\displaystyle \sum }}_{i=09}^9{C}_i{\left(-1\right)}^{9-i}f\left(x+iy\right)=0\text{.}$ We first find a special way of representing a given mapping as the sum of eight mappings. And by using the above representation, we will investigate the hyperstability of the general octic functional equation. Furthermore, we will discuss the Hyers–Ulam–Rassias stability of the general octic functional equation.