Question

sendo (n+1)! . (n-1)! / (n!)^2= 5/4 determine o valor de n :

Answer 1

Ola Karen 

(n + 1)!*(n - 1)!/(n!)² = 5/4

(n + 1)!/n! * (n - 1)!/n! = 5/4

(n + 1) * (1/n) = 5/4

(n + 1)/n = 5/4

4n + 4 = 5n

5n - 4n = 4

n = 4