Question

Simplifique a expressão

(n+2)! (h-1)!​

Answer 1

(n+2)! (n+2)(n+1)n(n-1)!

--------- = --------------------------- =

(n-1)! (n-1)!

(n+2)(n+1)n =

(n²+3n+2)n =

n³+3n²+2n