Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 7: Transcendental Functions - Section 7.5 - Indeterminate Forms and L'Hopital's Rule - Exercises 7.5 - Page 409: 56

Answer

$e$

Work Step by Step

L-Hospital's rule defined as $\lim\limits_{x \to \infty} f(x)=\lim\limits_{x \to \infty} \dfrac{p'(x)}{q'(x)}$ Consider $\ln f(x)=(\ln x) ^{1/\ln x}$ and $\ln f(x)= \dfrac{\ln x}{\ln x}$ or, $ f(x)=1$ Thus, we get $e^{[\lim\limits_{x \to 0^{+}} (1)]}=e^{1}=e$
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