@metal i dont think the is in that way. in that case u cannot solve the question. what i and rajetsen did is absolutely right. otherwise the question makes no sense. what i have done is i assumed the summation to be y. if u ignore one term in is the same as the sum is to infinity.
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
56
