https://olm.vn/hoi-dap/question/756390.html
x + 2⋮ x + 1
=> x + 1 + 1⋮ x + 1
Mà x + 1 ⋮ x + 1
=> 1⋮ x + 1
=> x + 1 ∈ Ư 1 = ∓1
Lại có : x ∈ N
=> x + 1 = 1
=> x = 0 (thỏa mãn )
Vậy x = 0
chúc cậu hok tốt @_@
\(x+2⋮x+1\)
\(x+1+1⋮x+1\)
\(1⋮x+1\)hay \(x+1\inƯ\left(1\right)=\left\{\pm1\right\}\)
x + 1 | 1 | -1 |
x | 0 | -2 |