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RenB
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The sequence a1, a2, a3, ..., an of n integers is such that ak = k if 18 Nov 2023, 06:19
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Bunuel
maddyboiler
Now this is what i dont understand. They just mention "k" (i guess constant) but k can take any value -1,-3 or +2. SHouldnt the answer be B then because the statement 2 specifically says that an is positive.

\(k\) in \(a_k\) is a subscript, meaning that \(a_k\) is \(k_{th}\) term in the given sequence which starts from \(a_1\), thus k must be some positive integer.

Complete solution is here: https://gmatclub.com/forum/the-sequence ... l#p1162192

Hope it helps.
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Got the answer wrong because of this :/
Thank you for the explanation!
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totaltestprepNick
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The sequence a1, a2, a3, ..., an of n integers is such that ak = k if 01 Mar 2026, 19:22
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Summer3
The sequence \(a_1\), \(a_2\), \(a_3\), ... \(a_n\) of \(n\) integers is such that \(a_k=k\) if \(k\) is odd, and \(a_k=-a_{k-1}\) if \(k\) is even. Is the sum of the terms in the sequence positive?

(1) \(n\) is odd.
(2) \(a_n\) is positive
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Nick Slavkovich, GMAT/GRE tutor with 20+ years of experience

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