help with question

[hexed bronze]

Call a three-term strictly increasing arithmetic sequence of integers special if the sum of the squares of the three terms equals the product of the middle term and the square of the common difference. Find the sum of the third terms of all special seqs.

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[lament nacelle]

So to begin with, what would be the general form of a three-term arithmetic sequence?

[novel schooner]

@hexed bronze

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[hexed bronze]

+close

[novel schooner]

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[novel schooner]

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