Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 13 - Sequences and Series - 13.2 Defining Functions Using Sums: Arithmetic Series - Exercises and Problems for Section 13.2 - Exercises and Problems - Page 546: 10



Work Step by Step

Finding the sum using the properties of sequences, we find: $$\sum _{n=1}^7\left(-1\right)^{n-1}\cdot \:2^n \\ 2\cdot \frac{1-\left(-2\right)^7}{1-\left(-2\right)} \\86$$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.