Question

giúp mình bài này với ạ

 

Answer 1

a: \(\Leftrightarrow2n-1\in\left\{1;-1;11;-11\right\}\)

hay \(n\in\left\{1;0;6;-5\right\}\)

a: \(\Leftrightarrow-5⋮n\)

hay \(n\in\left\{-1;1;5;-5\right\}\)

b: \(\Leftrightarrow6n-3⋮3n+2\)

\(\Leftrightarrow3n+2\in\left\{-1;-7\right\}\)

hay \(n\in\left\{-1;-3\right\}\)