Question

FUNCTIA F(X)=$\frac{x}{3} +1$
AFLATI X ASTFEL INCAT F(X)$\leq X$

Answer 1

[tex]\dfrac{x}{3}+1 \leq x |\cdot 3\\ x+3 \leq 3x\\ 3 \leq 2x\\ x \geq \dfrac{3}{2} \Rightarrow x \in [\dfrac{3}{2},\infty) , x \in \mathbb{R}[/tex]