Question

4n+1 chia hết cho n+2

Answer 1

=>4n+8-7 chia hết cho n+2

=>-7 chia hết cho n+2

\(\Leftrightarrow n+2\in\left\{1;-1;7;-7\right\}\)

hay \(n\in\left\{-1;-3;5;-9\right\}\)