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There are infinitely many possible rules: there is one or more polynomials of every degree≥

3 and then there are other possible functional relationships.


There is only one polynomial of degree 3 and that is


Un= (2n3- 15n2+ 19n + 12)/3 where n = 1, 2, 3, ...

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Q: What is the sequence of the pattern 6 2 -4 -8?
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