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part 1: for the arithmetic sequence where a2=66 and a5 =81, Find a formula for an,...

part 1: for the arithmetic sequence where a2=66 and a5 =81, Find a formula for an, and find the term a97.

part 2: find the mean of the 9th through the 60th terms, inclusive, of the sequence in part 1.

Math   Precalculus   
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