Prove that 3 + 11 + + (8n 5) = 4n2 n

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Prove that 3 + 11 + ∙ ∙ ∙ + (8n  5) = 4n2  n for all n ∈ N.
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Introduction to Real Analysis

ISBN: 978-0471433316

4th edition

Authors: Robert G. Bartle, Donald R. Sherbert

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