Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 6 - Inverse Functions - 6.1 Inverse Functions - 6.1 Exercises - Page 407: 30

Answer

Formula for the inverse $f^{-1}(x)=\sqrt[4] {(2-x)}$ The graph of the functions $f(x)=2-x^{4}$ and $f^{-1}(x)=\sqrt[4] {(2-x)}$ along the line $y=x$ on the same screen is depicted below:

Work Step by Step

Calculate the inverse of the function $f(x)=2-x^{4};x\geq0$ Write $y=f(x)$ $y=2-x^{4}$ Solve this equation for x in terms of y to get the inverse function. $x=\sqrt[4] {(2-y)}$ To express $f^{-1}(x)$ as a function of x,interchange x and y. The resulting equation is $y=\sqrt[4] {(2-x)}$ Therefore, the inverse of the function $f^{-1}(x)=y=\sqrt[4] {(2-x)}$ The graph of the functions $f(x)=2-x^{4}$ and $f^{-1}(x)=\sqrt[4] {(2-x)}$ along the line $y=x$ on the same screen is depicted below:
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