Science and Education Publishing Turkish Journal of Analysis and Number Theory 2333-1232 5 3 2017 4 7 Hyers-Ulam Stability of Generalized Tribonacci Functional Equation 80 85 EN S. Arolkar Department of Mathematics, D.M.'s College and Research Centre, Assagao, Goa 403 507- India Y.S. Valaulikar TJANT2017531 10.12691/tjant-5-3-1 2017 1 1 2017 3 14 2017 4 5 In this paper we study Hyers-Ulam stability of the generalized Tribonacci functional equation, where a, b and c are non- zero constants. The functional equation is solved and its stability is established in the class of functions where X is a Banach space.