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Some iterative methods free from second derivatives for nonlinear equation
Muhammad Aslam Noor Dept. of Mathematics, COMSATS Institute of Information Technology, Islamabad, Pakistan
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To overcome these drawback, presenting
Introduction In the implementation of methods, one has to evaluate the second derivative of the functions, which is itself a serious and difficult problem. To overcome these drawback, presenting some modifications of the method in his previous paper by an appropriate finite difference scheme.
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Ⅰ Iterative Methods For , a simple zero Define the sequence such that
for every , with He proposed an arbitrary such that with a parameter . Define Then It is similar to Newton’s method with
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Ⅱ Algorithm 2.1 Taking Then It implies that
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Ⅱ Algorithm 2.2 In algorithm 2.1, taking Then If is negligible, these algorithm collapse to Newton’s method. But if not, second derivative form interrupts our computation.
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Ⅵ New Approaches Taking and using Taylor series
(which is that by the form of Newton’s method)
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Ⅶ Algorithm 2.3 By Algorithm 2.1, It is for free from the second derivative
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Ⅸ Algorithm 2.4 A kind of second-order algebraic equation with the variable of
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Ⅹ Algorithm 2.5 Taking and neglecting term, Two-step Newton’s method
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Ⅰ Algorithm 2.6 Taking From the Algorithm 2.4, one can obtain several new flexible methods for solving the nonlinear equations.
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Ⅱ Theorem 2.1 For a simple zero of , if is sufficiently closed to , then Algorithm 2.4 satisfies It means that, the order of convergence is two.
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