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Homework Statement
Find the expression for the nth term for the sequence {1,1,-1,-1,1,1,-1,-1,...}
The Attempt at a Solution
No idea.
Yes, in part. I'm saying that a_{1} = 1, a_{5} = 1, a_{9} = 1, and so on.I don't exactly understand your notation. For n = 1 you're saying that a_{5} = 1? What does that mean?
My opinion differs from yours on the meaning of "obvious" here, but I won't create any more of an argument from my speculation.Mathnerdmo,
I think that both of our solutions would satisfy the "won't accept anything obvious" requirement. The instructor's instructions against submitting obvious solutions are vague to the point of meaninglessness, I doubt very much that the instructor has any concern about one-parameter vs. two-parameter solutions.
Your representation works, but is more complex than mine by at least one measure: my representation can be written more compactly.
Yes, that's exactly it.Honestly, I think that my teacher was looking for the solution Mathnerdmo gave. But he won't take off if it's still correct.
@Mark44: -1 :)
Are you saying a_{2m + n} = (-1)^{m} ?