Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Eyad

  • 2 years ago

An Infinite Geometric sequence Such : \[S \infty =81/2 , Sn/Tn=(3^n-1)/2\] ,Find The G.s ???

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

    Sinf??

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

    Sum to infinity :D Its rule is S∞ =a/1-r .

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

    you should have written more explicitly

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

    what do u mean ?

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

    sum up to infinity

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

    An infinite geometric series is an infinite series whose successive terms have a common ratio. Such a series converges if and only if the absolute value of the common ratio is less than one ( | r | < 1 ).

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

    lol ,thats all what I know xD

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

    I think its we can apply the rule only ..

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

    put n=2 ...

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

    1/r + 1 = 8

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

    find the value of a from the left relation

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

    u mean 1-r ,but why u put a =1 ?

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

    Oh ... sorry ... forgot to divide by 2

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

    ignore that post ... i wasn't thinking

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

    nvm :)

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

    sry for asking many questions :/

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

    \[ \frac{S_2}{T_2} = 4 = \frac{a +ar}{ar}\] find the value of r from here get the value of a from other relation

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

    aha...

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

    @satellite73 : can u help :)

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

    @experimentX :from where u got that 4 in Sn/Tn=4=... ?

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

    from your second relation ... put n=2

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

    oh, OK

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

    you will get the value of r from here use your first relation to get the second value

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

    *get the value of a

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

    oh ,k........TY ^.^_^.^

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

    Search OpenStudy
    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.