FUZZY STABILITY OF QADRATIC FUNCTIONAL EQUATIONS IN GENERAL CASES

The aim of this paper is to investigate fuzzy Hyers - Ulam - Rassias stability of the general case quadratic functional equation f(ax+by)+f(ax¡by) = a 2 f(x+y)+a 2 f(x¡y)+(2a2¡a)f(x)+(2b2¡a)f(y) where a; b ¸ 1 and fixed integers with a 6= 2b2. these functional equations are equivalent. It has proven in [1].