Application to Macroeconomic Models of Second-order Recurrences Equations

many paper has researched economic problems, and obtained many important conclusions. In this paper we shall consider the application to macroeconomic models of the ways for solving second-order recurrences, this paper hope certainly to research qualitative results, such as (We concern something) whether the income of the country will be more and more step by step, or it rise and fall in cycle. Finally, the action usually of a solution of equation is more worthy than the concrete formula though we usually want to obtain the formula ahead we can really determine our action.