Question
$(1 + xy)y\,dx + (1 - xy)x\,dy = 0$ का हल है
$\frac{{ydx + xdy}}{{{x^2}{y^2}}} + \frac{{dx}}{x} - \frac{{dy}}{y} = 0$
समाकलन करने पर,
$ - \frac{1}{{xy}} + \log x - \log y = k$ ==> $\log \frac{x}{y} = \frac{1}{{xy}} + k$
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