S. R. Hejazi - Mathematics, Iran University of Science & Technology
M. Nadjafikhah - Mathematics, Iran University of Science & Technology

In this paper we suggest a method to calculate the first integrals of a special system of the first order of differential equations. Then we use the method for finding the solutions of some differential equations such as, the differential equation of RLC circuit.

Distribution, First Integral, RLC Circuit, Heat Capacity