Question

Simplifique : (fatorial)
A) n! / (n-1) !
B) x! / (x-2)!
C) (n+1) ! / n!
D) (2x+2!) /(2x)!

Answer 1

A)

n! / (n-1)! =

n.(n-1)! / (n-1)!

n ✓

b)

x.(x-1)(x-2)!/(x-2)!

x.(x-1) ✓

c)

(n+1)!/n!

(n+1).n! / n!

(n+1) ✓

d) (2x+2)!/(2x)!

(2x+2)(2x+1)(2x)!/2x!

(2x+2)(2x+1)✓