SOLUTION: write a simplified explicit formula for the sequence 20, 13, 6, -1...

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Question 1115227: write a simplified explicit formula for the sequence
20, 13, 6, -1...
Answer by ikleyn(52858)   (Show Source): You can put this solution on YOUR website!
.
 = 20 - (n-1)*7.


Arithmetic progression, first term 20, common difference of -7.

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On arithmetic progressions,  see introductory lessons in this site:
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions
    - Solved problems on arithmetic 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 "Arithmetic progressions".


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Free of charge online textbook in ALGEBRA-II
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