Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 1 - Section 1.4 - Exponential Functions - 1.4 Exercises - Page 54: 26

Answer

The two points of intersection occur at $~~x = 1.8~~$ and $~~x = 5~~$ $~~g(x) = 5^x~~$ grows more rapidly when $~~x~~$ is large.

Work Step by Step

When we graph $f(x) = x^5$ and $g(x) = 5^x$ , we can see that there are two points of intersection. When $x = 1.765$: $f(x) = (1.765)^5 = 17.1$ $g(x) = 5^{1.765} = 17.1$ When $x = 5$: $f(x) = (5)^5 = 3125$ $g(x) = 5^5 = 3125$ The two points of intersection occur at $~~x = 1.8~~$ and $~~x = 5~~$ When $x \gt 5,~~$ then $~~g(x) \gt f(x)$ Therefore, $~~g(x) = 5^x~~$ grows more rapidly when $~~x~~$ is large.
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