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Updated February 12th, 2006

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Use the first 7 terms of the following geometric series for the problem below:

-6, -20.4, -69.36, -235.824, ...

What is the value of the common ratio ? r =

What is the sum of the first 7 terms? S₇ =

Use the first 7 terms of the following geometric series for the problem below: -6, -20.4, -69.36, -235.824, ...
What is the value of the common ratio ?	r =
What is the sum of the first 7 terms?	S₇ =