Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

INeedHelpPlease?

  • 2 years ago

How to find nth term of the series,and therefore Sum of n terms?

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

    \[\Large S_n=\frac{1}{1.4} + \frac{1}{4.7} + \frac{1}{7.10}..n \]

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

    @hartnn

  3. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    n'th term 1/n(n+3)

  4. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but that doesn't match for n=3?

  5. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1389456863526:dw| do this for every term

  6. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah, 1/n(n+3) will not work,

  7. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that "...n" implies thatere are total n terms ?

  8. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yep

  9. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    3n-2 3n+1

  10. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    1/ [ (3n-2)(3n+1)] this works ?

  11. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how did u think of that ? :|

  12. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    works i guess

  13. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    easy difference of 3 so multiple of 3 1..4...7..are all 1 less than multiple of 3

  14. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ***two less than

  15. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    did u get what to do for each term ? partial fraction kind of thingi

  16. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how do i find Sn now? partial fraction?i remember it kinda - 1/3((3n-2)-(3n+1))/(3n-2)(3n-3) ?

  17. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    did u get what i did in the drawing ?

  18. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    which drawing O_O

  19. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    if yes, do it for 2nd term and tell me what u get

  20. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    why did u do that?

  21. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1/4=3/4?

  22. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i'll correct it , wait

  23. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1389457539226:dw|

  24. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    do the same thing for 2nd term, then 3rd term, and observe what happens, then you'll know why that was done

  25. INeedHelpPlease?
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay

  26. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    did you get your sum ?

  27. 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.