Question

simplificar as expressões:

a) (n+1)!
_______, com n > ou = 1
(n-1)!

b) (x+2)!
_______, com x > ou = 0
x!​

Answer 1

(n+1)!.........(n+1)n(n-1)!
---------- = ---------------- = n(n+1)= n²+n
(n-1)!..........(n-1)!

(x+2)!.....(x+2)(x+1)x!
-------- = ---------------- =(x+1)(x+2)=x²+3x+2
x!.............x!