" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Un = 4 + (n-1)3 = 4 + 3n -3 = 1+ 3n
Sn = n/2 (a + un) = n/2(4 + 1+ 3n) = n/2(5+3n) =
5n/2 + 3n kuadrat/2 = 1/2(5n +3n kuadrat)
Seperti itu sepertinya