Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 12 Sequences and Series - 12.1 Define and Use Sequences and Series - 12.1 Exercises - Skill Practice - Page 798: 42


$\displaystyle \sum_{n=1}^{4}(\frac{1}{3^{n}})\qquad $or $\displaystyle \qquad\sum_{n=1}^{4}3^{-n}$

Work Step by Step

There are four terms, ( $\displaystyle \sum_{n=1}^{4}$... ) in which the denominators are the first four powers of 3... $a_{n}=3^{n}$ Sum = $\displaystyle \sum_{n=1}^{4}(\frac{1}{3^{n}})\qquad $or $\displaystyle \qquad\sum_{n=1}^{4}3^{-n}$
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