Question

determina valorele intregi ale lui x pentru care 2x -1 |4x -15.
ajutor

Answer 1

 2x-1|4x-15
2x-1|2x-1  /*(-2)
________________
2x-1|4x-15
2x-1|-4x+2
___________+__
2x-1|-13
=> 2x -1 ∈ D₋₁₃={-13,-1,1,13}
2x-1=-13 => 2x=-12 => x=-6
2x-1=-1 => 2x=0 => x=0
2x-1=1 => 2x=2 => x=1
2x-1=13 => 2x=14 => x=7
             ↓
x ∈{-6,0,1,7}