SOLUTION: For the following geometric sequence, find the recursive formula. {-80, 20, -5, ...}

Question 1071204: For the following geometric sequence, find the recursive formula.
{-80, 20, -5, ...}
Answer by ikleyn(52792)   (Show Source): You can put this solution on YOUR website!
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The recursive formula is = , n = 1, 2, 3, . . .

See introductory lessons on geometric progressions in this site
    - Geometric progressions
    - The proofs of the formulas for geometric progressions
    - Problems on geometric progressions
    - Word problems on geometric progressions

Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

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

RELATED QUESTIONS
For the following geometric sequence find the recursive formula: {-1, 3, -9, ...}. (answered by ikleyn)