Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition

Published by Brooks Cole
ISBN 10: 1-43904-957-2
ISBN 13: 978-1-43904-957-0

Chapter 3 - Determining Change: Derivatives - 3.7 Activities - Page 244: 8

Answer

$$\lim _{t \rightarrow \infty} \frac{e^{2 t}}{2 t}=\infty$$

Work Step by Step

Given $$\lim _{t \rightarrow \infty} \frac{e^{2 t}}{2 t}$$ using the Limit Rules and replacement, leads to the indeterminate form $$\lim _{t \rightarrow \infty} \frac{e^{2 t}}{2 t}=\frac{\infty}{\infty}$$ Applying L'Hôpital's Rule \begin{align*} \lim _{t \rightarrow \infty} \frac{e^{2 t}}{2 t}&=\lim _{t \rightarrow \infty} \frac{2e^{2 t}}{2 }\\ &=\lim _{t \rightarrow \infty} e^{2 t} \\ &=\lim _{t \rightarrow \infty} e^{\infty}\\ &=\infty \end{align*}
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