" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Un =99
b=2
un=11+(n-1)2
99=11-2+2n
90=2n
n=45
S45=45/2(11+99)
=43/2(110)
=2365