Exercício sobre fatorial

(FGV - 1974) $\phantom{X}n^2 \centerdot (n\,-\,2)!(1\,-\,\dfrac{1}{n})\;$ vale, para $\,n\,\geqslant\,2\,$.

$\,n!\,$

$\,(n\,+\,1)!\,$

$\,(n\,-\,1)!\,$

$\,(n\,+\,1)!(n\,-\,1)!\,$

nenhuma das respostas anteriores

resposta: (A)
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