Question

Se considera functia f : R->R,f(x)=ax-a+2,unde a este numar real.
a)Aflati f(1)
b)Aflati numarul real a,astfel incat f(2)=4

Answer 1

f(1)=a*1-a+2=a-a+2=2
f(2)=4rezulta a*2-a+2=4
2a-a+2=4
a+2=4
a=2