×

#### Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Click to Chat

1800-1023-196

+91-120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
```
if the first term of a gp is 6 ans the sum of first 15 terms is 29. find the common ratio of the gp?

```
5 years ago

ng29
1698 Points
```							=i think its quite easy , u can use the formula of sum of terms of gpcommom terms is known and sum of 15 terms are also givenput data in formula and get value of common ratio APPROVE IF USEFUL
```
5 years ago
sudhir
10 Points
```							Hi ng29,if we use the sum of n terms formula we get 29=6(r^15-1)/r-1=> 6r^15 -29r – 23=0now , how to get the value of r from here?plz. guide Thank you
```
5 years ago
ng29
1698 Points
```							ok i understand that whats ur doubtequation of such higher degree is impossible to solveso method for this is hit and trialon putting  r =  -1  , condition is satisfied , hence the answer APPROVE IF USEFULAPPROVE IF USEFUL
```
5 years ago
sudhir
10 Points
```							Hi, Thanks for your help...Is ther
```
5 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Algebra

View all Questions »

### Course Features

• 731 Video Lectures
• Revision Notes
• Previous Year Papers
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Test paper with Video Solution

### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions