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Sequence

by relaxin99 » Thu Feb 26, 2009 5:22 pm
The sequence a1, a2, a3......an of n integers is such that ak = - 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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by cramya » Thu Feb 26, 2009 5:34 pm
Please post the complete question.

Here;s the right one.

https://www.manhattangmat.com/forums/post17269.html