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Solution and Hyers-Ulam-Rassias Stability of Generalized Mixed Type Additive-Quadratic Functional Equations in Fuzzy Banach Spaces
By using fixed point methods and direct method, we establish the generalized Hyers‐Ulam stability of the following additive‐quadratic functional equation f ( x + k y ) + f ( x − k y ) = f ( x + y ) + f ( x − y )+(2( k …