SOLUTION: Given the first four terms and the number of terms of the geometric series, find the finite sum. -3 − 6 − 12 − 24 − …, n = 9

Algebra ->  Sequences-and-series -> SOLUTION: Given the first four terms and the number of terms of the geometric series, find the finite sum. -3 − 6 − 12 − 24 − …, n = 9      Log On


   

Question 1082362: Given the first four terms and the number of terms of the geometric series, find the finite sum.
-3 − 6 − 12 − 24 − …, n = 9
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.
Learn the formula for the sum of the first n terms of a geometric progression from these lessons

    - Geometric progressions
    - The proofs of the formulas for geometric progressions

and you will be able to solve/to tackle such problems.

There is no sense to go to the forum and ask for help with such STANDARD questions, when you can easily solve them on your own.


Certainly.


Regarding such simple problems, the most reasonable question you may ask is: "Where I can read about it ? Where I can learn it ?".

And if and when you will come with such a question, I will answer you: read this, or this, or that lesson in this site.

Your knowledge and skills will raise hugely.

There are three free of charge textbooks in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.
    - GEOMETRY - YOUR ONLINE TEXTBOOK
ideally structured and organized with hundreds of lessons, solved problems, theoretical materials and examples developed specially for you.


H a p p y   l e a r n i n g  ! !