Hi everyone,(adsbygoogle = window.adsbygoogle || []).push({});

I need some help to solve this differential equation.

The question states "Use the perturbation or multiple scale method to find the third-order approximate solution for the following system:

diff(x(t), t, t)+w^2*x(t)*(1+epsilon*x(t)^2) = 0 "

Currently, I am still reading and studying on this perturbation method.

Any advise or directions of what I need to do is much appreciated.

Thank you for your help in advance.

John

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# 2nd Order Nonlinear Differential Equation

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