A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
In a G.P. , the first term is 7, the last term is 448, and the sum is 889. Find the common ratio and the number of terms.
 2 years ago
In a G.P. , the first term is 7, the last term is 448, and the sum is 889. Find the common ratio and the number of terms.

This Question is Closed

koli123able
 2 years ago
Best ResponseYou've already chosen the best response.0it is coming r^(n1)=64

koli123able
 2 years ago
Best ResponseYou've already chosen the best response.0then i used the sum formula Sn=\[Sn =\frac{ a[r^n1) }{ r1 }\]

stgreen
 2 years ago
Best ResponseYou've already chosen the best response.3exactly...now you got two equations in two unknowns...so solve for r and n

stgreen
 2 years ago
Best ResponseYou've already chosen the best response.3where??tell me the second one

koli123able
 2 years ago
Best ResponseYou've already chosen the best response.0\[127=\frac{ r^n1 }{ r1 }\]

stgreen
 2 years ago
Best ResponseYou've already chosen the best response.3r comes out to be 2.isn't it??

koli123able
 2 years ago
Best ResponseYou've already chosen the best response.0The answer should come r=2 and n=7

stgreen
 2 years ago
Best ResponseYou've already chosen the best response.3yeah hold on lemme write

stgreen
 2 years ago
Best ResponseYou've already chosen the best response.3^from here you can get r=2....then put r=2 in first equation to get n
Ask your own question
Ask a QuestionFind 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.