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Sequences and means

(See attached file for full problem description)

1. Find the sum of the finite geometric series to three decimal places.

9 n
Σ - 3(0.5)
n=3

2. Write the first 5 terms of the specified sequence. Determine whether the sequence is arithmetic. If it is, find the common difference.
Problem is "a(sub n)" = "1 over n+3"
a = _1_
n n+3

3. Find the sum of the first 14 terms of the arithmetic sequence, if the first term is -4 and the common difference is 5.

4. Find three arithmetic means between -5 and -37.

5. Determine which of the four sequences below are geometric.
7,14,28,56,112,...
7,1,-5,-11,-17,...
7,8,9,11,12,...
7,-14,28,-56,112,...

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Solution Summary

The problems in this set include geometric and arithmetic sequences and means.

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