SOLUTION: Given the sequence{-1,3,7,11,...}, find a 25

Question 1166729: Given the sequence{-1,3,7,11,...}, find a 25
Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!
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The pattern shows an arithmetic progression with the first term of -1 and the common difference of 4.


The general formula for the n-th term of an AP is   =  + d*(n-1).


In the given case   = -1 + 4*(25-1).


You can complete calculations on your own.

You are explained and instructed (!)

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For introductory lessons on arithmetic progressions see
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions
in this site.

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    - 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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