Answer
$\approx-0.688$
Work Step by Step
Using graphing calculator as asked in question we get
$\sum ^{100}_{n=1}\dfrac {\left( -1\right) ^{n}}{n}\approx-0.688$
(Also shown in picture)
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 12 - Section 12.1 - Sequences and Summation Notation - 12.1 Exercises - Page 851: 60
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