Applicare la formula: $\frac{a}{a}$$=1$, dove $a=x$ e $a/a=\frac{x\log \left(x\right)}{x\ln\left(x\right)}$

Applicare la formula: $\log_{a}\left(x\right)$$=\frac{\ln\left(x\right)}{\ln\left(a\right)}$, dove $a=10$

Applicare la formula: $\frac{\frac{a}{b}}{a}$$=\frac{1}{b}$, dove $a=\ln\left(x\right)$, $b=\ln\left(10\right)$, $a/b=\frac{\ln\left(x\right)}{\ln\left(10\right)}$ e $a/b/a=\frac{\frac{\ln\left(x\right)}{\ln\left(10\right)}}{\ln\left(x\right)}$

Applicare la formula: $\lim_{x\to c}\left(a\right)$$=a$, dove $a=\frac{1}{\ln\left(10\right)}$ e $c=\infty $