STABILITY OF SOME GENERALIZED QUADRATIC FUNCTIONAL EQUATION

Lee, Sang Han (Department Of Cultural Studies Chungbuk Provincial University Of Science & Technology)

In this paper we prove the stability of some generaliged quadratic functional equation $$a^2f(\frac{x+y}{a})+a^2f(\frac{x-y}{a})=2f(x)+2f(y)$$.