Let's say I have something like(adsbygoogle = window.adsbygoogle || []).push({});

[tex]d^2 u / d x^2 = u + u^2 / a[/tex], where [tex]u = 1/r[/tex]

How do I integrate to solve for x in terms of r?

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# Let's say I have something like[tex]d^2 u / d x^2 = u + u^2 /

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