Oscillations of First Order Linear Delay Differential Equations with positive and negative coefficients

Ali Hussain, Mohamad, Intisar Qasem, Ahmed Zainab, Abdullah
Baghdad Science Journal   unpublished
Oscillation criteria are obtained for all solutions of the first-order linear delay differential equations with positive and negative coefficients where we established some sufficient conditions so that every solution of (1.1) oscillate. This paper generalized the results in [11]. Some examples are considered to illustrate our main results.