Let be a polynomial of degree n and for a complex number , let ？denote the polar derivative of the polynomial ？with respect to . In this paper, first we extend as well as generalize the result proved by Dewan and Mir [Inter. Jour. Math. and Math. Sci., 16 (2005), 2641-2645] to polar derivative. Besides, another result due to Dewan et al. [J. Math. Anal. Appl. 269 (2002), 489-499] is also extended to polar derivative.
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![\"\"](\"Edit_ef9afe92-0528-4c76-bc42-45aeb267d76e.jpg\")
be a polynomial of degree n and for a complex number , let ![\"\"](\"Edit_7f5f5846-0361-43fe-89ca-22feafc0927b.jpg\")
？denote the polar derivative of the polynomial ![\"\"](\"Edit_fcdc874d-2955-4779-93b9-4924ea1bccc7.jpg\")
？with respect to . In this paper, first we extend as well as generalize the result proved by Dewan and Mir [Inter. Jour. Math. and Math. Sci., 16 (2005), 2641-2645] to polar derivative. Besides, another result due to Dewan et al. [J. Math. Anal. Appl. 269 (2002), 489-499] is also extended to polar derivative.
