Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Lukecrayonz

  • 2 years ago

Find the nth term of the geometric sequence: a_2 or a[2]=3, a_5 or a[5]=(3/64), n=1

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

    @satellite73

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

    @bahrom7893 anything? haha

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

    I literally know the equation if you have a[1], but nothing when you're solving for a[1]

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

    http://screensnapr.com/v/3ZOlWC.png maybe this will help

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

    Because the equation while using a[1], is a[n]=a[1]r^(n-1)

  6. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a2=a1*r=3; a1=3/r

  7. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    just do the same thing as the solved example.. or is there a trick somewhere?

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

    And solving for r now.. other example doesn't make that much sense to me, and I feel like there is a trick because n-1, 1-1=0.

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

    and anything to the power of 0 is 1, so a[1]*1=a[1]..?

  10. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    r is either powers of 4 or 2..

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

    Hmm..?

  12. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    hang on..

  13. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    r=1/4, a1=3/1/4=12

  14. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a2=3=a1r a1=3/r

  15. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a5=a1r^4=a1rr^3=3r^3=3/64

  16. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    r^3=1/64 r=1/4

  17. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a1=3/r=3/1/4=12

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

    Got it! Thank you so much haha, stumped me

  19. bahrom7893
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i don't even know why they give u n, it's totally irrelevant imo

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

    Got another question, that literally has nothing to do with anything..

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

    Posted it

  22. 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.