Calculus: Early Transcendentals 9th Edition

Published by Cengage Learning
ISBN 10: 1337613924
ISBN 13: 978-1-33761-392-7

Chapter 2 - Section 2.6 - Limits at Infinity; Horizontal Asymptotes - 2.6 Exercises - Page 138: 12

Answer

(a) We could estimate that $\lim\limits_{x \to \infty}f(x) = 0.13$ (b) We could estimate that $\lim\limits_{x \to \infty}f(x) = 0.1353$

Work Step by Step

(a) $f(x) = (1-\frac{2}{x})^x$ By using the zoom function on a graphing calculator, we can see that the value of the function is approximately $0.13$ as the values of $x$ become more positive. We could estimate that $\lim\limits_{x \to \infty}f(x) = 0.13$ (b) $f(x) = (1-\frac{2}{x})^x$ We can evaluate the function at various values of $x$: $f(10) = (1-\frac{2}{10})^{10} = 0.1074$ $f(100) = (1-\frac{2}{100})^{100} = 0.1326$ $f(500) = (1-\frac{2}{500})^{500} = 0.1348$ $f(1000) = (1-\frac{2}{1000})^{1000} = 0.1351$ $f(5000) = (1-\frac{2}{5000})^{5000} = 0.1353$ $f(10,000) = (1-\frac{2}{10,000})^{10,000} = 0.1353$ We could estimate that $\lim\limits_{x \to \infty}f(x) = 0.1353$
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