Question

Cho A = [ m ; 3m-2 ] ; B = [-2;1]

 Tìm m để A giao B khác rỗng

Answer 1

 

Answer 2

\(A\cap B\ne\varnothing\Rightarrow\left\{{}\begin{matrix}m\le1\\3m-2\ge-2\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m\le1\\m\ge0\end{matrix}\right.\)

\(\Rightarrow0\le m\le1\)