Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - Test - Page 1085: 7

Answer

$-1705$

Work Step by Step

Given geometric sequence with $a_1=5, r=-2$, we have $S_{10}=a_1\frac{1-r^{10}}{1-r}=(5)\frac{1-(-2)^{10}}{1-(-2)}=-1705$

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