# CHAPTER 5 INFINITE SEQUENCES AND SERIES - SERIES

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## CHAPTER 5 INFINITE SEQUENCES AND SERIES - SERIES

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We can add the terms of a sequence {an } and get an expression of the form: a1+ a2+ a3+ …+ an + … which is called a series and denoted by However what does it mean by the sum of infinitely many terms? Example. We can try to add the terms of the series 1+2+3+…+n+… and get the cumulative sums 1, 3, 6, 10, …, The nth sum n(n+1)/2 becomes very large as n increases

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