Getting stuck on simple logarithmic equation: $x \times \ln (x) = 1$ $$x \times \ln (x) = 1$$
I am trying to solve that equation. I used the theory $\ln(a) = \ln(b)$ being equivalent to $a = b$ and got stuck at
$$x = e^{\frac{1}{x}}$$
That's as far as I went and I know there's a solution (around 1.8 or 1.9), since I used my calculator, but I'd like to know how to do this by hand.

You can use the law of logarithms which states that for $a,b\in\mathbb{R}$: $a\ln{b}=\ln\left(b^{a}\right)$.
Therefore, you have:
$$x\ln{x}=1 \implies \ln{x^{x}}=1$$
You hence have:
$$x^{x}=e$$
Which does not have an elementary closed form, so you must use numerical methods (for instance Newton-Raphson iteration) to get an approximation (Mathematica gives $x\approx 1.76322$).
If you're interested, the closed form solution is: $$\frac{1}{W(1)}, \qquad \text{ where } W(z) \text{ is the LambertW function}$$
