04-10-2017
Mathematics

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In this particular arithmetic sequence, a7 = 50 and a15 = 114. What is the value of a21? Hint: an = a1 + d(n − 1), where a1 is the first term and d is the common difference.

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04-10-2017

If you would like a list of the steps/formula, message me and I'll send it to you as it's too long to post here. The answer to your question would be a21 = 162.

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