Question:

What is an arithmetic sequence?

by  |  earlier

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1. -2, 4, -6, 8, ...

2. -8, -6, -4, -2, ...

3. 2, 4, 8, 16, ...

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  1. №2 'cos for an arithmetic sequence a(n+1) - a(n) =constant

    in №2 constant= + 2

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