Hi. I believe I understand separation of variables for a first order DE. But can anyone tell me how to use it on a second order DE? In particular I have been looking at this example(adsbygoogle = window.adsbygoogle || []).push({});

http://en.wikipedia.org/wiki/Integrating_factor#General_use"

where it is claimed that one can use separation of variables to solve

[tex]

\frac{d^2 y}{dt^2}=Ay^{2/3}

[/tex]

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# Separation of variables for second order DE

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