Calculus: Early Transcendentals (2nd Edition)

Published by Pearson
ISBN 10: 0321947347
ISBN 13: 978-0-32194-734-5

Chapter 8 - Sequences and Infinite Series - 8.3 Infinite Series - 8.3 Exercises - Page 623: 53

Answer

$\dfrac{238}{24975}$

Work Step by Step

We are given the repeating decimal: $0.00\overline{952}=0.00952952....$ Rewrite the given repeating decimal: $0.00952952....=0.00952+0.0000952+0.000000952+.......$ $=\sum_{k=0}^{\infty} 0.00952\cdot 10^{-3k}$ The infinite geometric series $\sum_{k=0}^{\infty} a_1r^k$ has the sum $S=\dfrac{a_1}{1-r}$, where $r=0.001$. Determine the value of the repeating decimal: $\sum_{k=0}^{\infty} 0.00952\cdot 10^{-3k}=\dfrac{0.00952}{1-0.001}=\dfrac{\dfrac{952}{100000}}{\dfrac{999}{1000}}=\dfrac{952}{99900}=\dfrac{238}{24975}$
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