" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(a-2b) + (a-b) + (a) + (a+b) + (a+2b) = 5a = 60
a+(n-1)b=12
a+2b=12
S5=(n/2)(2a+(n-1)b)
=5/2 (2a+4b)
=5/2. 2(a+2b)
=5.12
=60