Answer
$40$
Work Step by Step
We sum from i = low bound to i = high bound.
$3^{1-1} + 3^{2-1} + 3^{3-1} + 3^{4-1} = 3^0 + 3^1 + 3^2 + 3^3 = 1 + 3 + 9 + 27 = 40$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Section 11.3 - Series - Exercise Set - Page 651: 16
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