Question: 3. Let the sequence {sk} be defined as: 5,15,45,135,, for the domain of the positive integers. (a) Is this an arithmetic or geometric sequence, and

3. Let the sequence {sk} be defined as: 5,15,45,135,, for the

3. Let the sequence {sk} be defined as: 5,15,45,135,, for the domain of the positive integers. (a) Is this an arithmetic or geometric sequence, and why? What is its common difference/ratio? [ 3 pts] (b) What is the index of this sequence? [ 3 pts] (c) Give the algebraic form of the sequence. [ 3 pts] (d) Evaluate: i=110si You do not need to simplify. [3 pts]

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