Limiti di funzione

 $\lim_{x\rightarrow2}\ \frac{x^2-4x+4}{x^2-3x+2}=$  

 $\lim_{x\rightarrow1}\ \frac{x^2-4x+4}{x^2-3x+2}=$  

 $\lim_{x\rightarrow\infty}\ \frac{x^2-4x+4}{x^2-3x+2}=$  

La funzione

 $\lim_{x\rightarrow\pi}\ \frac{sen\ x}{x}=$  

(a)  

 $\lim_{x\rightarrow\pi}\ \frac{\left(x-\pi\right)sen\ x}{1+\cos\ x}=$  

(a)  

 $\lim_{x\rightarrow2}\ \frac{4-2^x}{2x-x^2}=$  

(a)  

 $\lim_{x\rightarrow0}\ \frac{\ln\left(\cos\ x\right)}{x\ sen\ x}=$  

 $\lim_{x\rightarrow\frac{\pi}{2}}\ \frac{\sqrt{sen\ x}-1}{\left(2x-\pi\right)^2}=$  

 $\lim_{x\rightarrow+\infty}\ \left(\frac{2x+1}{2x}\right)^{3x}\ =$