It is not

  • moreeni
    1·
    6 months ago

    Could somebody explain how did we get 2+S/2?

    • mathemachristian[he]
      1·
      4 months ago

      The first (…) in the term above that is a geometric series of 2-n, which gives the 2.

      The second (…) is the same series but with an extra 1/2 that gets pulled out of the term.