Erdem, KYalçinbas, S2025-04-102025-04-100094-243Xhttp://hdl.handle.net/20.500.14701/34645In this paper, a Bernoulli matrix method is developed to find an approximate solution of high- order linear differential difference equations with variable coeffcients under the mixed conditions. The solution is obtained in terms of Bernoulli polynomials.EnglishProceedings Paper