" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
U1 = a = S1 = 2+8 = 10
beda = b = 2(2) = 4
Un = a +(n-1)b --> Un = 4n + 6
U20 = 4(20) +6 = 86