Câu hỏi 18

\(\left\{ \begin{array}{l}{V_{\left( {O; - 1} \right)}}\\A\left( {3;2} \right)\end{array} \right.\)

Qua \({V_{\left( {O; - 1} \right)}}\) biến \(A\) thành \(A'\)

\(\begin{array}{l} \Rightarrow \overrightarrow {OA'}  = k\overrightarrow {OA}  \Leftrightarrow \left( {x;y} \right) =  - 1\left( {3;2} \right)\\ \Leftrightarrow \left\{ \begin{array}{l}x =  - 3\\y =  - 2\end{array} \right. \Rightarrow A\left( { - 3; - 2} \right)\end{array}\)

Chọn D.