PLEASE DO NOT GIVE ME THE ANSWERS. I'm just confused on what to do to get TO the answers. I think I know the limit of a sub n but how do I go about finding s sub n? I completely blanked on this question.
Suppose Σ a, is a series such that Σ an = 10, and s,-al + a2 + + an for n 2 1. Then lims,- and lima,-