" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
U₃ = 18 --> a+2b = 18
U₇ = 38 --> a+6b = 38 _
4b = 20 --> b = 5
a+2.5 = 18
a = 18-10
a = 8
Sn = n/2 (2a+(n-1)b)
S₂₄ = 24/2 (2.8+23.5)
= 12 (16+115)
= 12 . 131
= 1572