\( d s=\left(r^{2} s^{2}+r^{2}-s^{2}-1\right) d r \)
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It's not separable, and it's not linear, so it's a bit tricky to solve. However, we can try to solve it using an integrating factor. Let's rewrite the equation in the form: \( \frac{ds}{dr} + P(r,s) = Q(r,s) \) Show more…
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