Question

simplifique:
a)_n!__
   (n-1)!

b)_(x-2)!_
    (x-1)!

Answer 1

A) $\boxed{\boxed{ \frac{n!}{(n-1)!} = \frac{n*(n-1)!}{(n-1)!} = n}}$

B) $\boxed{\boxed{ \frac{(x-2)!}{(x-1)!} = \frac{(x-2)!}{(x-1)*(x-2)!} = \frac{1}{x-1}}}$

Espero ter ajudado. :))