" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Verified answer
A = 1b = U2 - U1
b = 5 - 1
b = 4
Un = a + ( n - 1 ) b
69 = 1 + 4n - 4
69 = 4n - 3
69 + 3 = 4n
72 = 4n
Jadi, banyak nya suku pada barisan tersebut adalah 18.