Find the Derivative of f(x) = x^log(x) using Logarithmic Differentiation

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SUMMARY

The derivative of the function f(x) = x^log(x) can be found using logarithmic differentiation. By letting y = x^log(x), the natural logarithm is applied: log(y) = log(x) * log(x). Differentiating both sides with respect to x using the chain rule leads to the expression for dy/dx. This method simplifies the differentiation process for functions where the variable is raised to a variable exponent.

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  • Understanding of logarithmic differentiation
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  • Knowledge of natural logarithms and their properties
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Homework Statement


Find the derivative of the following function f.


Homework Equations



f(x)=x^log(x)

The Attempt at a Solution



I really don't know how to do this, as it's x to the power of a function of x.
 
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Use the fact that for any function u(x),

[tex]u(x) = e^{\ln(u(x))}[/tex]
 


Or (almost the same thing) use "logarithmic differentiation".

If y= xlog x then log(y)= log(xlog(x))= log(x)log(x).

Differentiate both sides with respect to x, using the chain rule on the left side, and then solve for dy/dx.
 

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