Question

tim so nguyen n thoa man :A=n:n+3 la so nguyen

Answer 1

Ta có: n : n + 3 là một số nguyên.

=> n \(⋮\) n + 3 <=> n + 3 - 3 \(⋮\) n+3

=> 3 \(⋮\) n + 3 (Vì n + 3 \(⋮\) n + 3)

=> n + 3 \(\in\)Ư(3) = {-1;1;-3;3}

=> n\(\in\){-4;-2;-6;0}

Answer 2

n la so nguyen nha. HELP ME ! PLEASE

Answer 3

Answer 4

Answer 5

Để A là số nguyên thì:

n \(⋮\) n+3

\(\Leftrightarrow\) n + 3 - 3 \(⋮\) n + 3

\(\Leftrightarrow\) 3 \(⋮\) n + 3

\(\Leftrightarrow\) n + 3 \(\in\) Ư₍₃₎ = \(\left\{\pm1;\pm3\right\}\)

\(\Leftrightarrow\) n \(\in\) \(\left\{-4;-2;-6;0\right\}\)