Throughout this paper, we investigate the Hyers-Ulam stability of k-Tribonacci functional equation if (k, x) = k f(k, x -1) + f( k, x -2) + f(k, x -3) in the class of functions f : N × R → X where X is real non-archimeadean Banach space.
In this paper, we present the Hyers-Ulam-Rassias stability of quartic functional equation f(2x + y) + f(2xy) = 4.f(x + y) + 4f(xy) + 24f(x) 6f(y) in Random 2-Normed space .
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