A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

Is the sequence geometric? 2, 6, 18, 54,... A. yes B. no

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

    A

  2. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if 6/2 = 54/18 then yes

  3. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    otherwise no

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

    You always multiply by 3 to get the next term

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

    Okay thanks! I am writing that in my notebook so I do not forget that! :)

  6. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the multiply by 3 part, or the dividing last terms part?

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

    Both!

  8. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    given a sequence\[a_1,a_2,a_3,a_4,...a_n,a_{n+1}\]we can determine if its geometric by taking the ratio any 2 terms that are next to each other.\[\frac{a_2}{a_1}=\frac{a_7}{a_6}=\frac{a_{n+1}}{a_n}\]

  9. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    of course it should equal if you go the other way to\[\frac{a_1}{a_2}=\frac{a_n}{a_{n+1}}\]but it just wont be the correct ratio

  10. 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.