The sixth term of an arithmetic sequence is 28 and the ninth term is 36. Count the sum of the first 14 terms of the arithmetic sequence.

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
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Chapter8: Sequences, Series,and Probability
Section8.2: Arithmetic Sequences And Partial Sums
Problem 3ECP: The 8th term of an arithmetic sequence is 25, and the 12th term is 41. Write the first 11 terms of...
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1. The sixth term of an arithmetic sequence is 28 and the ninth term is 36. Count the sum of the first 14 terms of the arithmetic sequence.

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