9231 P13 - Jun 2012 - Q1 - 5 marks
6487
Find the sum of the first \(n\) terms of the series
\(\frac{1}{1 \times 3}+\frac{1}{2 \times 4}+\frac{1}{3 \times 5}+\ldots\)
and deduce the sum to infinity.
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