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Explicit formulas for arithmetic sequences

Imran and Aubrey were asked to find an explicit formula for the sequence 14,5,4,13,...14,5,-4,-13,...
Imran said the formula is g(n)=149(n1)g(n)=14-9(n-1).
Aubrey said the formula is g(n)=149ng(n)=14-9n.
Which one of them is right?
Choose 1 answer:
Choose 1 answer: