Question

Persamaan n?
(n+1)! / (n-1)! =30

Answer 1

(n+1) (n) (n-1)! / (n-1)! = 30
(n+1) (n) = 30
n^2 + n - 30 = 0 >persamaan n
(n-5) (n+6) = 0
n= 5 atau n= -6