Differentiate the function with respect to $x$: $(\log x)^{x}+x^{\log x}$

Vedclass pdf generator app on play store
Vedclass iOS app on app store
Let $y=(\log x)^{x}+x^{\log x}$.
Let $u=(\log x)^{x}$ and $v=x^{\log x}$.
Then $y=u+v$,so $\frac{dy}{dx} = \frac{du}{dx} + \frac{dv}{dx}$ ...........$(1)$
For $u=(\log x)^{x}$,taking log on both sides:
$\log u = x \log(\log x)$.
Differentiating with respect to $x$:
$\frac{1}{u} \frac{du}{dx} = 1 \cdot \log(\log x) + x \cdot \frac{1}{\log x} \cdot \frac{1}{x} = \log(\log x) + \frac{1}{\log x}$.
$\frac{du}{dx} = (\log x)^{x} \left[ \log(\log x) + \frac{1}{\log x} \right] = (\log x)^{x-1} [1 + \log x \cdot \log(\log x)]$ ...........$(2)$
For $v=x^{\log x}$,taking log on both sides:
$\log v = \log x \cdot \log x = (\log x)^{2}$.
Differentiating with respect to $x$:
$\frac{1}{v} \frac{dv}{dx} = 2 \log x \cdot \frac{1}{x}$.
$\frac{dv}{dx} = x^{\log x} \cdot \frac{2 \log x}{x} = 2 x^{\log x-1} \log x$ ...........$(3)$
Substituting $(2)$ and $(3)$ into $(1)$:
$\frac{dy}{dx} = (\log x)^{x-1} [1 + \log x \cdot \log(\log x)] + 2 x^{\log x-1} \log x$.

Explore More

Similar Questions

If $y = ({x^x})^x$,then $\frac{dy}{dx} =$

If $y = [(x+1)(2x+1)(3x+1) \ldots (nx+1)]^{\frac{3}{2}}$,then $\frac{dy}{dx}$ at $x=0$ is

If $y = x^{(x^x)}$,then $\frac{dy}{dx} = $

If $y=(x+3)^2 \cdot(x+4)^3 \cdot(x+5)^4$,then,the first order derivative of $y$ with respect to $x$ is . . . . . . .

The derivative of $f(x)=x^{\tan ^{-1} x}$ with respect to $g(x)=\sec ^{-1}\left(\frac{1}{2 x^2-1}\right)$ is

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo