SOLUTION: How do I find the rule for the nth term for this problem? 2, -4, 8, -10, 14,... I have tried solving for an arithmetic and a geometric with no success and have tried quadratic bu

Algebra ->  Sequences-and-series -> SOLUTION: How do I find the rule for the nth term for this problem? 2, -4, 8, -10, 14,... I have tried solving for an arithmetic and a geometric with no success and have tried quadratic bu      Log On


   

Question 1114838: How do I find the rule for the nth term for this problem?
2, -4, 8, -10, 14,...
I have tried solving for an arithmetic and a geometric with no success and have tried quadratic but nothing works for me.
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
x(n) = (-1)^(n-1) * (n+3, where n+3 is prime) for n = 1,2,.....)
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Note this is a selection process
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