Generalized Hyers-Ulam Stability for a Mixed Quadratic - Quartic (QQ) Functional Equation in Quasi-Banach Spaces
K. Balamurugan, M. Arunkumar & P. Ravindiran · Journal of Advances in Mathematics and Computer Science · 2015
In this paper we establish the general solutions and investigate the Hyers - Ulam stability of the following functional equation f(3x + 2y + z) + f(3x + 2y - z) + f(3x - 2y + z) + f(3x - 2y - z) = 72[f(x + y) + f(x - y)...
Open access
Research Article
10.9734/BJMCS/2015/17551