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| Línea 39: | Línea 39: | ||
l -r + r_n = \sqrt{l_2 - \left[\left(n - {1 \over 2} \right)s_h \right]^2} | l -r + r_n = \sqrt{l_2 - \left[\left(n - {1 \over 2} \right)s_h \right]^2} | ||
\\ | \\ | ||
r_n = r - l + \sqrt{ | r_n = \color{Red}{r} - \color{Red}{l} + \sqrt{\color{Red}{l}^2 - \left[\left(n - {1 \over 2} \right)\color{Red}{s_h} \right]^2} | ||
</math> | </math> | ||