Question

Task 2
a. Determine whether the sequence 27,9,3,1,...is geometric arithmetic or neither?
b. Write a recursive definition and an explicit formula for this sequence.
c. Use summation notation to write the series related to the first ten terms of the sequence given in part (a). Then evaluate this series.
d. Use summation notation to write the series related to the infinite sequence given in part (a). Determine whether this series converges or diverges. If the series converges, find its sum.
e. Describe a real world situation that can be modeled by this sequence.