Question

aflati x apartine lui n pentru care fractia 25 pe 2x-7 € N

Answer 1

[tex]\frac{25}{2x-7}\ ap.\ N\\ 2x-7\ ap\ D25\\ 2x-7\ ap\ \{1,5,25,-1,-5,-25\}\\ 2x\ ap\ \{8,12,32,6,2,-18\}\\ x\ ap\ \{4,6,16,3,1,-9\}\\ Dar\ x\ ap\ lui\ N=\ \textgreater \ S:x\ ap\ \{4,5,16,3,1\}[/tex]