" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
=4+7
=11
S2=4.2²+7.2
=16+14
=30
Un= a+(n-1)b
= 11+n.b-b
= 11+8n-8
beda = U2-U1
=(30-11)-11
=19-11
= 8