Question

hi.pls help.question following

Answer 1

if the nth partial sum of a series \[\sum_{1}^{?\infty}An\] is Sn = n-1/n+1 ,find An and \[\sum_{1}^{\infty}An\]

Answer 2

I was wondering why I couldn't find it; but I'm not sure what you are trying to find. Originally I thought it was something completely different. But I understand the question now. I deleted the other comment since it really had nothing to do.

A while ago I though you had to find An I think what you would have to do would be to subtract. for example S(1)-S(0)= A(1) and S(2)-S(1)=A(2) and so on.

S(n+1)-S(n-1)=An I think that would be the equation.

As for the sum of all An's I'm not sure

Answer 3

thnx