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Mathematics 13 Online
OpenStudy (anonymous):

classify as arithmetic, geometric, or neither. Finally find an explicit formula (rule for the nth term) for each. Designate the first term with n = 1. ii)2b,4b,6b,8b,10b,12b,14b

Directrix (directrix):

The common difference is 2b. That is, each term is 2b more than the previous term. So, is the sequence arithmetic or geometric?

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