Further development and refining some inequalities for polynomial zeros

摘要

In the article, we extend bounds for the roots of polynomials with complex coeffi- cients obtained by Ricˇ aZamfir[R.Zamfir, Refining Some Inequalities, Journal of Inequali- ties in Pure and Applied Mathematics, no. 3, Article 77, vol. 9, 2008 available online at http://jipam.vu.edu.au/v1n2/011 99.html