“…Thus the optimal order for three evaluations per iteration would be four, four evaluations per iteration would be eight and so on. Recently, some fourth and eighth order optimal iterative methods have been developed using weight functions (see [1,4,5,7,8,10,11,12,13,14] and references therein). A more extensive list of references as well as a survey on the progress made in the class of multi-point methods is found in the recent book by Petkovic et al [10].…”