A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Find S12 for the series 1 + 2 + 4 + 8 +.. i got 2048

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Michele_Laino am i right

  2. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    here we have a geometric series, whose first term is a1=1 and constant q= 2

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay

  4. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so, we can apply this formula: \[\Large {S_{12}} = {a_1}\frac{{1 - {q^{12}}}}{{1 - q}}\]

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay

  6. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    after a substitution, i get this: \[\Large {S_{12}} = {a_1}\frac{{1 - {q^{12}}}}{{1 - q}} = 1 \cdot \frac{{1 - {2^{12}}}}{{1 - 2}} = ...?\]

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -4097

  8. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I got 4095

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    nvm ur right, typo sorry lol

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its 4095

  11. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes!

  12. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.