Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 11 - Infinite Series - 11.2 Summing and Infinite Series - Preliminary Questions - Page 547: 6



Work Step by Step

We have $$S_N=\Sigma_{n=0}^N2=2+2+\cdots+2=2N$$ We can choose $N=13$. This gives $S_N=26\gt 25$.
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