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Fie functia f: R cu valori in R, f(x)=3x+a
A) Detreminati a aparinte R pantru care A(-2;-3) Aparine G(f)


Răspuns :

[tex]\sf f:\mathbb R \longrightarrow \mathbb R;f(x)=3x+a \\ A(-2;-3) \in G_f \longrightarrow f(-2)=-3 \\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~f(-2)=-2*3+a \\ -6+a=-3 \\ a=-3+6 \\ \boxed{\sf a=3}[/tex]