SOLUTION: how to find the 7th term of an arithmetic sequence with a1 = -81 and d=12

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Question 1158532: how to find the 7th term of an arithmetic sequence with a1 = -81 and d=12
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

Apply the general formula for the n-th term of an Arithmetic progression

    a%5Bn%5D = a%5B1%5D + d*(n-1).


With your data

    a%5B7%5D = -81 + 12*(7-1) = -9.

Answered ans solved. And completed.

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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.

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".


Save the link to this textbook together with its description

Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

into your archive and use when it is needed.


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Hello, to come with such question, as yours in the post, is the same as to ask how many is 2x2.

The student studying arithmetic progressions, must know it at the day and at the night, as the multiplication table.

Develop your knowledge reading my lessons (!)


Happy learning (!)