Dadas as afirmações:

1. I. $\underset{x\to 1}{\lim }\left(\frac{a\cdot \ln x}{1-x}\right)=a$
   

2. II. Se $f\left(x\right)=3x-4$ e $f\left[g\left(x\right)\right]=7x-1$, logo $\underset{x\to 0}{\lim }g(x)=1$
   

3. III. $\underset{x\to \frac{\pi }{4}}{\lim }[\cos x\cdot \mathrm{cossec}x\cdot \mathrm{tg}x\cdot {\mathrm{sen}}^{2}x]=\frac{1}{2}$
   

Podemos afirmar que: