Se considera functia f: R \ {-1} ->R, f(x)=[tex]\frac{x^{2} }{x+1}[/tex]

Stabiliti daca functia f are limita in x= -1


Răspuns :

Răspuns:

Trebuie  calculate limitele laterale in -1

ls= x→ -1 x<-1 lim f(-1)=lim[tex]\frac{(-1)^{2} }{(-1-0+1)} =\frac{+1}{-0}=[/tex]-∞

ld= x→ -1 x>-1=lim f(-1)=[tex]limf(-1+0)=\frac{(-1)^{2} }{-1+0+1}=\frac{+1}{+0}[/tex]=+∞

ls≠ld => functia  nu are limita   in   x= -1

pas cu pas: