eng Science and Education Publishing Turkish Journal of Analysis and Number Theory 2333-1232 2017-04-07 5 3 80 85 10.12691/tjant-5-3-1 TJANT2017531 article S. Arolkar Suchita.golatkar@yahoo.com 1 Y.S. Valaulikar 2 Department of Mathematics, D.M.'s College and Research Centre, Assagao, Goa 403 507- India Department of Mathematics, Goa University, Taleigao Plateau, Goa 403 206 - India 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. http://pubs.sciepub.com/tjant/5/3/1/tjant-5-3-1.pdf Fibonacci functional equation Hyers-Ulam stability Tribonacci functional equation