Suppose that the nth partial sum of the series ∞

Σan is Sn = (5n-2)/(5n+2)
n=1  

Find a3. I have tried plugging in n = 3 and solving Sn as well as summing the first three terms of the series to find a3. I believe something is wrong with my approach and I would be happy to get some guidance.

Similar Questions
  1. Suppose that the nth partial sum of the series   ∞Σn=1 an   is  sn =   5n − 2 5n + 2  
    1. answers icon 1 answer
  2. Suppose that the nth partial sum of the series∞ Σan is Sn = (5n-2)/(5n+2) n=1 Find a3. I have tried plugging in n = 3 and
    1. answers icon 1 answer
  3. Find the indicated partial sum of the series.infinity E 3(1/2)^i i=1 third partial sum
    1. answers icon 0 answers
    1. answers icon 0 answers
more similar questions