Core stretch
Express the positive \(p\) in terms of \(r,s,q,m\) in \(\dfrac{r}{3\pi}=\sqrt{\dfrac{q}{s-mp^2}}\).[3]
Assume \(r>0\), \(m,q\ne0\) and \(\dfrac{sr^2-9\pi^2q}{mr^2}>0\).
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