Prove that f(x) = x/k can be defined on (0, ∞) by the require- ment that it be the inverse function of g(x) = x* on [0, 0), where k is any positive integer. Use the inverse function theorem to derive the usual formula for f'.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Can we explicity "prove that f(x)=x^{1/k} can be defined on [0,\infty) by the requirement that it be the inverse function of g(x)=x^k on [0,\infty), where k is any positive integer"?

**Prove that \( f(x) = x^{1/k} \) can be defined on \([0, \infty)\) by the requirement that it be the inverse function of \( g(x) = x^k \) on \([0, \infty)\), where \( k \) is any positive integer. Use the inverse function theorem to derive the usual formula for \( f' \).**

This mathematical problem involves proving that the function \( f(x) = x^{1/k} \) is the inverse of \( g(x) = x^k \) and is well-defined on the interval \([0, \infty)\). The task is to use the inverse function theorem to derive the derivative of \( f(x) \).

The context of this problem is suitable for an educational website that covers topics in calculus, specifically focusing on the properties of inverse functions and their derivatives. Instructors and students may use this problem to explore the relationship between a function and its inverse, and to understand the application of the inverse function theorem in finding derivatives.
Transcribed Image Text:**Prove that \( f(x) = x^{1/k} \) can be defined on \([0, \infty)\) by the requirement that it be the inverse function of \( g(x) = x^k \) on \([0, \infty)\), where \( k \) is any positive integer. Use the inverse function theorem to derive the usual formula for \( f' \).** This mathematical problem involves proving that the function \( f(x) = x^{1/k} \) is the inverse of \( g(x) = x^k \) and is well-defined on the interval \([0, \infty)\). The task is to use the inverse function theorem to derive the derivative of \( f(x) \). The context of this problem is suitable for an educational website that covers topics in calculus, specifically focusing on the properties of inverse functions and their derivatives. Instructors and students may use this problem to explore the relationship between a function and its inverse, and to understand the application of the inverse function theorem in finding derivatives.
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