Third and Fourth-order iterative methods for solving systems of nonlinear equations

The object of the present paper is to extend the third-order iterative method for solving nonlinear equations into systems of nonlinear equations. Since our motive is to develop the method which improve the order of convergence of Newton's method with minimum number of functional evaluations.To achieve this goal,we have used weighted method. Computational efficiency is compared not only traditional way but also recently introduced flops-like based concept. Finally numerical results are given to confirm theoretical order of convergence.