" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
50=-100+(n-1)1
50=-100+n-1
50+101=n
151=n
sn=n/2(2a+(n-1)b)
sn=151/2(-200+(150)1)
sn=151/2(-200+150)
sn=151(-50)/2
sn=151(-25)
sn=-3775
jadi jawabannya -3775