11th International Conference of Numerical Analysis and Applied Mathematics (ICNAAM), Yunanistan, 21 - 27 Eylül 2013, cilt.1558, ss.2575-2578, (Tam Metin Bildiri)
In this work, we consider first-order ordinary differential equations which have no systematic way to find their Lie symmetries unlike higher order differential equations. Our aim is to use second-order ordinary differential equations derived from the first-order ordinary differential equations in order to resolve this important deficiency for the first-order ordinary differential equations. Before we mention about finding the Lie symmetries of the ordinary differential equations briefly. Later on we present some of the examples related with the subject