Question

fie functia f:R->R ; f(x)= 2x+a
Sa se determine a apartine R a.i A(1supra 2 ; -2) apartine Gf
Va rogg repede!!!!

Answer 1

[tex]A(\frac{1}{2},-2)\in G_f\Leftrightarrow f(\frac{1}{2})=-2\Leftrightarrow\\ 2\frac{1}{2}+a=-2\Leftrightarrow 1+a=-2\Leftrightarrow a=-2-1=-3\\ \text{Deci }\boxed{a=-3}[/tex]