Analytical Approximate Solutions for the Cubic-Quintic Duffing Oscillator in Terms of Elementary Functions

Figure 5

Comparison of the approximate solution (dashed line and triangles) with the numerical solution of (2.1) (continuous line and squares) for 𝜆₁=1, 𝜆₃=1, 𝜆₅=1 and 𝐴=3 (𝐿₂=0.0085975).