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Geometrical summation of the series
Published online by Cambridge University Press: 31 October 2008
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a, (a + d)r, (a + 2d)r2,…
The following method of summing the mixed series is an extension of the well-known method for the G.P. given by Dr Dougall in the April issue of the Notes for 1909.
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- Copyright © Edinburgh Mathematical Society 1913
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