" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Mungkin maksudnya 20 dan 116 kali ya,,,
a= 20, Un=116 n= 13
Sn= n/2 (a+Un)
Sn= 13/2 (20+116)
Sn= 13/2 (136)
Sn= 884 <-------- jawaban