SOLUTION: A gp has 8 terms.its first and last term are 0.3 and 38.4 and its common ratio is 2 find the sum of the terms of the gp

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Question 1128005: A gp has 8 terms.its first and last term are 0.3 and 38.4 and its common ratio is 2 find the sum of the terms of the gp
Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
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Use the standard formula for the sum of the first 8 terms of a GP.


You are given the first term and the common ratio - it is enough info to use this formula.


The given info about the value of the 8-th term is NOT NECESSARY and is EXCESSIVE - you can omit it and forget about it - 
it is not used in the solution.


The sum is


    S =  = .


Use your calculator.

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On geometric progressions,  see the introductory lessons
    - Geometric progressions
    - The proofs of the formulas for geometric progressions
    - Problems on geometric progressions
    - Word problems on geometric progressions
in this site.

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The referred lessons are the part of this online textbook under the topic
"Geometric progressions".

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Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

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