A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
math 12 geometric sequences.
which term has the value of 7over1024 in the geometric sequence 28,14,7
anonymous
 4 years ago
math 12 geometric sequences. which term has the value of 7over1024 in the geometric sequence 28,14,7

This Question is Closed

Mimi_x3
 4 years ago
Best ResponseYou've already chosen the best response.1It's like before; find the common ratio first.. \[\large \frac{T_{2}}{T_{1}} = \frac{14}{28} = \frac{1}{2} \] \[\large \frac{T_{3}}{T_{2}} = \frac{7}{14}=\frac{1}{2} \] Then use the formula.. \[\large T_n = ar ^{n1}\] where a is the first term of the sequence and r is the common ratio.. \[\large T_n = \frac{7}{1024} \] \[\large ar ^{n1} = \frac{7}{1024} \]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes I did that and i got 7 over 1024 = 28(1over2)to the power of n  1

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and i divided each sides by 28

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and i used log method and I am not getting a right answer..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[(n1) \log(\frac{1}{2}) = \log(\frac{7}{1024*28})\] \[n1 = 12\] n = 13

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohhhhh okay thanks!!! :)
Ask your own question
Sign UpFind 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
 Engagement 19 Mad Hatter
 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.