This document provides two equations to solve: (a) an equation involving factorials where n! = 42 and is to be solved for n, and (b) an equation involving factorials where (n+1)! - n! = 16(n-1)! and is to be solved for n.

2. http://www.youtube.com/watch?v=fyw9xPLl

6. 04. Resolva as equações:
a) n!
= 42.
(n − 2)!
( n +1)!− ! =16( n −1)!
n
b)