" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(1-2) + (3-4) + (5-6) + ... + (99-100)
-1 + (-1) + (-1) + ... + (-1) [Sebanyak 50 kali]
-1 x 50
-50