Question

Simplifique a fração (n-1)!+(n-2)!/n!

Answer 1

Resposta:

[(n-1)!+(n-2)!]/n!

[(n-1)(n-2)!+(n-2)!]/n(n-1)(n-2)!

[(n-1)+1]/n(n-1)

=n/n(n-1)

=1/(n-1)