" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
JawabSn = 3n² - 5n
u3 = s3 - s2
u3 = 3(3²) - 5(3) - ( 3.2² -5(2))
u3 = (27-15) - (12-10)
u3 = 12 - 2
u3 = 10