f(x)=1/x-1⇒ f(x)*=(1/x-1)* ⇒pt a putea efectuea acesta functie folosim formula:(f/g)*=(f)*xg-f*(g)*/g² (1/x-1)*=(1)*x(x-1)-[1x(x-1)*]/(x-1)²⇒0(x-1)-[1x(1)]/(x-1)²⇒0-1/(x-1)²=-1/(x-1)² f(x)*=-1/(x-1)² sper ca te am facut sa intelegi derivata intai sucees