" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
U3+U7=22
a+4b=11
3+4b=11
4b=11-3
b=2
S18= 18/2.(2.3+(18-1).2)
= 9.(6+38)
=9.44
=396