Question

Mohon bntuannya kak no 7

Answer 1

(n+1)! / (n-2)! = 10 n!/(n-3)!

(n+1).n! / (n-2)(n-3)! = 10.n! / (n-3)!

(n+1) / (n-2) = 10
(n+1) = 10(n-2)
n + 1 = 10n -20
-9n = -21
n = 21/9 = 7/3