a,\(3⋮\left(n+5\right)\)
\(=>n+5\inƯ\left(3\right)\)
\(=>n+5\in\left\{3;1;-1;-3\right\}\)
\(=>n\in\left\{-2;-4;-6;-8\right\}\)
b,\(n⋮13=>B\left(13\right)=n\)
Do \(-14< n< 27\)
\(=>n\in\left\{-13;0;13;26\right\}\)
a,3⋮(n+5)
=>n+5∈Ư(3)
=>n+5∈{1; -1; 3; -3}
=>n∈{-4; -6; -2; -8}
b,n⋮13=> n \(\in\) B(13)
=>B(13)=\(\left\{...;-26;-13;0:13;26;39;...\right\}\)
=>n∈\(\left\{...;-26;-13;0:13;26;39;...\right\}\)
Mà -14<n<27
=>n ∈ \(\left\{-13;0;13;26\right\}\)
