[tex]L =\lim\limits_{x\searrow 0}\ln x\\ \\\textbf{Fac schimbarea de variabila:}\\\ln x = t \Rightarrow x = e^t\\ \text{Daca }x \searrow 0, \text{ atunci }e^t \searrow 0 \Rightarrow t \to -\infty\\ \\L = \lim\limits_{t\to -\infty} t \Rightarrow \boxed{L= -\infty}[/tex]
