Question

Sederhanakan
1. n! / (n-1)!
2. (n+2)! / n!

Answer 1

1. n! / (n - 1)! = n (n -1)! / (n - 1)! = n
2. (n +2)! / n! = (n + 2) (n + 1) n! / n! = (n + 2) (n + 1) = n² + 3n + 2