Given the sequence of numbers: {-3,9,-27,.} a) What kind of set is the sequence? b) What kind of progression is it? c) What is the common difference/ratio? d) What are the extremes of the progression?...

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Extracted text: Given the sequence of numbers: {-3,9,-27,.} a) What kind of set is the sequence? b) What kind of progression is it? c) What is the common difference/ratio? d) What are the extremes of the progression? e) What is the sum of the 10th to 30th terms of the progression? f) If the common ratio/difference was changed to -0.5, what is the total sum of the progression?