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Finding the nth term and Sum of a Geometric Series

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Use the geometric sequence of numbers 1,1/2,1/4,1/8,.... 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? Please round your answer to 4 decimals.

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Solution attaches a .doc file to show the calculations for figuring out the sum and nth term of a geometric sequence.

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