*Department of mathematics, DCR University of Science & Technology, Murthal, Sonepat, Haryana, E-mail: nawneethooda@gmail.com
**Department of mathematics, Kanya Mahavidyalaya, Kharkhoda, Sonepat, Haryana, India, s_saroha30@yahoo.com
Mathematical subject classification-39B72, 47H09
In this paper, the stability of cubic functional equation f (kx + y) − f (x + ky)=(k −1)(k +1) 2[f (x) − f (y)] − k(k −1) f (x − y) (where k is a positive integer greater than 2) using direct and fixed point method in random normed spaces has been proved.
Hyers-Ulam-Rassias stability, cubic functional equation and random normed spaces
