Friday

October 31, 2014

October 31, 2014

Posted by **Kelly** on Monday, January 11, 2010 at 9:04am.

I have NO idea how to attempt to solve this. I do not want an answer just instuctions. Thanks

- Algebra -
**drwls**, Monday, January 11, 2010 at 10:13amThe terms in the sequence are presumably

a*r^n.

I rceommend that you read

http://en.wikipedia.org/wiki/Geometric_progression

The first four terms would be (starting with n=0),

a, a r, ar^2 and a r^3.

The sum is a (1 + r + r^2 + r^3)

-3 * (1 + 3 + 9 + 27)

= -120

**Answer this Question**

**Related Questions**

Math - Question 1 Write the first four terms of the sequence whose general term...

Math PLEASE HELP PLEASE PLEASE PLEASE - Question 1 Write the first four terms ...

Math - an = 3n - 1 Answer 2, 3, 4, 5 2, 5, 8, 11 -2, -5, -8, -11 4, 7, 10, 13 3...

Algebra - Determine whether each sequence is arithmetic or geometric. Find the ...

Functions 11: Series and Sequence 2 - The sum of the first two terms of a ...

Maths - 1..The first 2 terms of a geometric progression are the same as the ...

math - Determine whether each sequence is arithmetic or geometric. Find the next...

Math *URGENT - Please give the answers and solutions for each. 1.If the second ...

Can someone help me?! - The 1st, 5th and 13th terms of an arithmetic sequence ...

Advanced Functions - I need help answering these questions 1. State the Common ...