Abathun, Addisalem (PhD)Aragaw, Getahun2019-09-302023-11-042019-09-302023-11-042018-08-04http://etd.aau.edu.et/handle/123456789/19240This thesis presents an efficient approach for determining approximate solutions of ordinary linear differential equations at ordinary points, near regular singular points and near irregular singular points. Test examples demonstrate the effectiveness and inefficiency of a given method at different points.enApproximateSolutionLinearDifferential EquationThesis