SOLUTION: Find the sum of the 1st 8 terms of the geometric series whose 1st term is 5 and whose common ratio is 3.

Question 1207230: Find the sum of the 1st 8 terms of the geometric series whose 1st term is 5 and whose common ratio is 3.
Answer by ikleyn(52798) (Show Source): You can put this solution on YOUR website!
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Apply the standard formula for the sum of the first n terms of a geometric progression

     = ,


where "a" is the first term, and "r" is the common ratio

     =  = 16400.    ANSWER

Solved.

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On geometric progressions, see 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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