8. The sequence ao, a1, a2,... is given recursively by a = ak-1 + 4k, k 21 and o =1. 'a) Use iteration to guess an explicit formula for the sequence. (b). obtained in part (a). Please note that if you have a problem completing the induction, you might want to double check your guess in part (a). Use mathematical induction to verify the correctness of the formula you

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