Respuesta :


[tex] \frac{n(3n - 1)}{( n - 1)(n + 1)} \times \frac{n + 1}{n {}^{2} } \\ \frac{3n - 1}{n - 1} \times \frac{1}{n} \\ \frac{3n - 1}{n(n + 1) } \\ \frac{3n - 1}{n {}^{2} + n } [/tex]
I hope this is the right answer
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