Question

Aflati multimea x apartine Z , pentru care (3x+9)/(2x-3)  apartine Z.

Answer 1

Rezolvand ecuatiile:
(3x + 9)/(2x - 3) = 0
(3x + 9)/(2x - 3) = - 1
(3x + 9)/(2x - 3) = 1
(3x + 9)/(2x - 3) = -2
(3x + 9)/(2x - 3) = 2
...........................
s.a.m.d.

am obtinut solutiile:

x ∈ {-12; -3; 0; 1; 2; 3; 6; 15}