Question

AM NEVOIE DE AJUTOR URGENT DAU CORANA
EX 17 DOAR D​

Answer 1

Explicație pas cu pas:

$\frac{15}{2x + 1}\in \mathbb{N} \implies (2x + 1 ) \in \mathcal{D}_{15} \\ (2x + 1) \in \Big\{ 1; 3; 5; 15\Big\} \ \Big|(-1) \\ 2x \in \Big\{ 0; 2; 4; 14\Big\} \ \Big|(:2) \\ \implies x \in \Big\{ 0; 1; 2; 7\Big\}$