" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
pertanyaannya U7 ?
brarti mencari b,rumus Sn= n/2 (2a+ (n-1)b)
S6 = 6/2 (2a + (6-1)b)
S6= 3 (2a+ 5b)
117 = 3 (2.120 + 5b)
117= 3 (240+5b)
117= (3x240) + (3x5b)
117= 720+15b
-15b = 720-117
-15b = 603
b = -40,2 knapa hasilnya koma ya?? waduh :D