Tunç, C.Tunç, O.2025-05-102025-05-1020151935-009010.12785/amis/0902452-s2.0-84930980740https://doi.org/10.12785/amis/090245https://hdl.handle.net/20.500.14720/4913In this note, two theorems are presented concerning the well known second order linear differential system X+a(t)X =P(t). While the results are not new, the proofs presented simplify previous works since the Gronwall inequality is avoided which is the usual case. The technique of proof involves the integral test and examples are included to illustrate the results. © 2015 NSP.eninfo:eu-repo/semantics/closedAccessLinear Differential SystemQualitative PropertySecond OrderArticle92N/AQ3953956