If $y=x^x, \frac{d y}{d x}$ will be: |
$x^x$ $x^x(1+\log x)$ $x^{x-1}$ $x^{x+1}$ |
$x^x(1+\log x)$ |
$y=x^x$ .......(1) taking $\log$ on both sides $\log y=\log x^x$ $\Rightarrow \log y=x \log x$ as $\log a^b$ $=b \log a$ diffecenttating both sides w.r.t (x) $\frac{d}{d x}(\log y)=\frac{d}{d x}(x \log x)$ $\Rightarrow \frac{1}{y} \frac{d y}{d x}=x \frac{d}{d x}(\log x)+\log x \frac{d x}{d x}$ using product rule $\Rightarrow \frac{1}{y} \frac{d y}{d x} =\frac{x}{x}+\log x$ $\frac{d y}{d x} =y(1+\log x)$ Substituting y from eq (1) $\frac{d y}{d x}=x^x(1+\log x)$ |