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Respondido

3. Simplifique as expressões:
(n+1)!
-------
(n-1)!​

Resposta :

EinsteindoYahoogo

Resposta:

(n+1)!

-------

(n-1)!​

=

...(n+1)n*(n-1)!

------- ----------------

.....(n-1)!​

= (n+1)*n =n²+n

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