【Abstract】 The object of this paper is to propose an iteration method for the root finding problem of solution of second-order ordinary differential equations y″ +Q(x)y=0. The iteration methods is the following Where n=0, 1, 2, ..., and When Q(x) is decrease (or increase) the sequence(A)(or(B)) is global conver- gent and has the convergence order four.更多还原