Question

Como calcular n!-(n+1)!/ n! ?

Answer 1

n! - (n+1)!      n! - (n+1).n!         n! [ 1 - (n+1)]
------------- = ------------------- = ---------------------- = 1 - (n+1) = 1 - n -1 = -n
      n!                     n!                          n!