SOLUTION: Write an explicit formula for the sequence -13 , -6 , 1 , 8

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Question 1136211: Write an explicit formula for the sequence -13 , -6 , 1 , 8
Answer by ikleyn(52810)   (Show Source): You can put this solution on YOUR website!
.

     = -13 + (n-1)*7,   n = 1, 2, 3, 4, . . . 


or,  equivalently


     = -20 + 7n,   n = 1, 2, 3, 4, . . . 


It is an arithmetic progression with the first term of -13 and the common difference of 7.

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    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions
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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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