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JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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The sum of the first nn terms of the series 12+34+78+1516+…\frac{1}{2}+\frac{3}{4}+\frac{7}{8}+\frac{15}{16}+\ldots is
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Correct option: C
n+2−n−1n+2^{-n}-1
Option C is correct because the sum of the series is found by rewriting each term as (1 - fraction) and then summing the resulting series.

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