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GMAT Data Sufficiency (DS) | Re: The sequence a1, a2, a3, ..., an of n integers is such that

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nelliegu wrote:

Bunuel wrote:
KevinBrink wrote:
Can you explain this statement a little further, I just do not understand how you arrived at that statement Hence, a2=-a1=-1. Regards


Stem says that\(a_k=k\) if\(k\) is odd. So, for\(k=1=odd\) we have that\(a_1=1\) .

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?
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