Answer
$\approx -14.824$
Work Step by Step
$S_{n}=\dfrac {a_{1}\left( r^{n}-1\right) }{r-1}=\dfrac {-3.772\times \left( \left( -1.553\right) ^{5}-1\right) }{-1.553-1}\approx -14.824$
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 - 11.3 Geometric Sequences and Series - 11.3 Exercises - Page 1034: 38
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