Document Type : Research Paper
Faculty of Mathematics, University of Sistan and Baluchestan, Zahedan 987-98155, Iran
In this paper a new family of fifteenth-order methods with high efficiency index is presented. This family include four evaluations of the function and one evaluation of its first derivative per iteration. Therefore, this family of methods has the efficiency index which equals 1.71877. In order to show the applicability and validity of the class, some numerical examples are discussed.