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
(1) n is odd
(2) a(n ) is positive
Please post the complete question.
Here;s the right one.
https://www.manhattangmat.com/forums/post17269.html
