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Describe the pattern in the sequence of numbers. Then predict the next number. 1, -4, 9, -16, ...
 Sep 13, 2018
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certainly looks to be

 

\(s_n = (-1)^{n-1} n^2,~n = 1, ~2,~\dots\)

 

can you predict \(s_5\) ?

 Sep 13, 2018
edited by Rom  Sep 13, 2018

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