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13. If a, =-4 and a, = 3n – 5a,-1 » find the fourth partial sum, S,.

13. If a, =-4 and a, = 3n – 5a,-1 » find the fourth partial sum, S,.

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section: Chapter Questions
Problem 28CT: Find the 16th partial sum of the arithmetic sequence 6, 18, 30, 42, . . . .
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13. If a, = -4 and a, = 3n– 5a,-1 , find the fourth partial sum, S4.
Transcribed Image Text:13. If a, = -4 and a, = 3n– 5a,-1 , find the fourth partial sum, S4.
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