" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
b = 5
Un = 104
n = 104 - 4 : 5 = 20
Sn = n/2 ( a + Un)
Sn = 20/2 (4 + 104)
= 10 (108)
= 1080