ρ = [ H ( n + 1 ) K n ] n {\displaystyle \rho ={\biggl [}{\frac {H}{(n+1)K_{\mathrm {n} }}}{\biggr ]}^{n}}
![{\displaystyle \rho ={\biggl [}{\frac {H}{(n+1)K_{\mathrm {n} }}}{\biggr ]}^{n}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/551df1d20e37f94f88c60f8b7bbc96ded75c0900)