" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
un = 3n -2
Sn = 1/2n ( a +un)
= 1/2n ( 1 + (3n-2)
= 1/2n ( 3n - 1)
= 3/2n² - 1/2n