Show that StartFraction d Over dx EndFraction​(ln kx​)equalsStartFraction d Over dx EndFraction ln x​, given that xgreater than 0 and kgreater than 0 is a real number.

Operations Research : Applications and Algorithms
4th Edition
ISBN:9780534380588
Author:Wayne L. Winston
Publisher:Wayne L. Winston
Chapter2: Basic Linear Algebra
Section: Chapter Questions
Problem 15RP
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Show that StartFraction d Over dx EndFraction ​(ln kx​)equalsStartFraction d Over dx EndFraction ln x​, given that xgreater than 0 and kgreater than 0 is a real number.
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Answer:

To show that StartFraction d Over dx EndFraction(ln kx) equals StartFraction d Over dx EndFraction(ln x), we can simply use the chain rule of differentiation.

Let y = ln kx, then we can rewrite it as:

y = ln k + ln x

Taking the derivative of both sides with respect to x:

StartFraction d y Over dx EndFraction = StartFraction d Over dx EndFraction (ln k + ln x)

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