Question

NHANH LÊN NHÉ ĐIII

Answer 1

a) \(\Rightarrow\left(n-1\right)+3⋮\left(n-1\right)\)

\(\Rightarrow\left(n-1\right)\inƯ\left(3\right)=\left\{-3;-1;1;3\right\}\)

Do \(n\in N\)

\(\Rightarrow n\in\left\{0;2;4\right\}\)

b) \(\Rightarrow2\left(n+1\right)+3⋮\left(n+1\right)\)

\(\Rightarrow\left(n+1\right)\inƯ\left(3\right)=\left\{-3;-1;1;3\right\}\)

Do \(n\in N\Rightarrow n\in\left\{0;2\right\}\)