# Geometric Sequence : Ratio of Terms and Geometric Sums of First n Terms

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Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27... to find the following:

a) What is r, the ratio between 2 consecutive terms?

b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms?

c) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 12 terms?

Please show all work to help me understand this problem. Thanks

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#### Solution Summary

A geometric sequence is investigated.

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