[x + 5] = -3
[x] + 5 = -3
[x] = -3 - 5
[x] = -8
Noi cunoastem urmatoarea relatie:
[tex]\displaystyle{x-1 < [x] \leqslant x}[/tex]
[tex]\displaystyle{ Daca \ [x] = -8 \implies x-1 < -8 \leqslant x }[/tex]
[tex]\displaystyle{ x < -7 \leqslant x + 1 }[/tex]
[tex]\displaystyle{ x \in [-8, -7) }[/tex]