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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ujjawal vishal Best Answer
option A Terms of the series are in geometric progression. Here 1st term a = 1 common ratio r = -(1/2) Since, nth term of G.P. =a(r^(n-1)) so, 15 term = 1.((-1/2))^(15-1) =(-1/2)^14 = 2^(-14)
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