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Catalyst University
Power Series | Power Series & Interval of Convergence: Example 1
Power Series | Power Series & Interval of Convergence: Example 1
Professor Dave Explains
Alternating Series, Types of Convergence, and The Ratio Test
An introduction to alternating series, and an overview of the types of convergence and the ratio test.
Khan Academy
Khan Academy: Alternating Series Test
When a series alternates (plus, minus, plus, minus,...) there's a fairly simple way to determine whether it converges or diverges: see if the terms of the series approach 0.