A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Find the sum of the finite geometric series. 3-9+27-81+243-729+2187-6561+19683-59049

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

    for the finite G series the formula is [a(1-r^(n-1)]/1-r

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

    a=3, r=-3 , n= 10 S(n) = a(1-r^(n) ) / (1-r) sub etc lol

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

    \[\frac {a(1-r^n) }{1-r}\]

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

    :( again mistake

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

    yes right :)

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

    wait min

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

    you might be right, yeh, thought it looked a little strange I wikipedia it, and it is a(1-r^(n-1) ) / (1-r)

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

    oh let me check

  9. dumbcow
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm no you were right before

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

    no I was correct firsdt time

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

    yes , just went to check a high school maths study guide lying around

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

    yes the first 1 is right

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

    damm wikipedia, its usually a good resource for maths

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

    but wikipedia shows the same formula u wrote at the first place :)

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

    I can seem to find it, ahh I am bit tired

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

    cant*

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

    i am lost now lol

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

    yes its for sure :)

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

    \[\frac {a(1-r^n)}{1-r}\] sub in a=3, r=-3, n=10

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

    3[1-(-3)^10]/1-3 =3[1-3^10]/2

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

    so is the answer 1536?

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

    ???

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

    u calculated it?does it come 1536?

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

    yes that is what i got, is that what you got?

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

    i dint calculate :)

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

    oh ok... but does that make sense? my answer???

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

    sure :)

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

    lol ok thank you

  29. 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.