Question

Answer 1

Bài 2 :

Ta có : \(x=\dfrac{a+17}{a}=1+\dfrac{17}{a}\)

- Để x là số nguyên .

\(\Leftrightarrow a\inƯ_{\left(17\right)}\)

\(\Leftrightarrow a\in\left\{1;-1;17;-17\right\}\)

Vậy ...

Answer 2

Bài 3 :

Ta có : \(y>0\)

\(\Leftrightarrow\left[{}\begin{matrix}\left\{{}\begin{matrix}m-3>0\\m+2>0\end{matrix}\right.\\\left\{{}\begin{matrix}m-3< 0\\m+2< 0\end{matrix}\right.\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}m>3\\m< -2\end{matrix}\right.\)

Vậy ....\(m\in Z/\left\{-2;-1;0;1;2;3\right\}\)