Math CentralQuandaries & Queries


Question from Xabiso, a student:

The 10th term of an arithmetic sequence is 28 and the 7th term is 19. Calculate the common difference and the first term of the sequence.

The common difference of an arithmetic sequence is the difference between successive terms. How many of these differences are there to get from the 7th term to the 10th term? What is the common difference?


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