" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
U5 = a + 4b = 17U10 = a + 9b = 32
pers. 1 dan 2 dikurang, maka -5b = -15, b = 3 dan a = 5
S25 = 25/2 (2(5) + 24(3))
S25 = 25/2 (10 + 72)
S25 = 25/2 x 82
S25 = 25 x 41 = 1025
#semoga membantu