Answer
$343$
Work Step by Step
$\sum_{i=1}^5 (3^i-4)$
$=(3^1-4)+(3^2-4)+(3^3-4)+(3^4-4)+(3^5-4)$
$=-1+5+23+77+239$
$=343$
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 - 11.1 Sequences and Series - 11.1 Exercises - Page 1014: 51
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