Answer
$0.00032$
Work Step by Step
Formula to calculate the n-th term of a geometric series is
$a_n=a_1r^{n-1}$
Here, common ratio $r=\dfrac{a_2}{a_1}$
For $n=7$
Thus, $a_7=(5)(\dfrac{-1}{5})^{7-1}=\dfrac{1}{3125}=0.00032$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.3 - Geometric Sequences and Series - Exercise Set - Page 854: 30
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