م مقاله کنفرانسی سال ۱۳۹۸ ۹۴۶ مشاهده Analytical methods for solving nonlinear oscillator systems In the present paper attempts have been done to solve Nonlinear Oscillator by using Akbari Ganji’s Metho… Akbari-Ganji’s Method (AGM)Analytically solutionDTM method