Sum of a Telescoping Series (II)
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The area of each colored region is , so and .
Contributed by: Soledad MĒ Sáez Martínez and Félix Martínez de la Rosa (March 2011)
Open content licensed under CC BY-NC-SA
Reference: R. W. Wang, "Proof without Words: ," Mathematics Magazine, 65(5), 1992 p. 338.