قرینۀ نقطۀ $A = \left[ {\begin{array}{*{20}{c}}
{ 2} \\
1
\end{array}} \right] $ نسبت به نقطۀ $B = \left[ {\begin{array}{*{20}{c}}
{ 4} \\
-3
\end{array}} \right] $ کدام است؟
1 )
$A' = \left[ {\begin{array}{*{20}{c}}
{ -7} \\
6
\end{array}} \right] $
2 )
$A' = \left[ {\begin{array}{*{20}{c}}
{ -2} \\
-1
\end{array}} \right] $
$A' = \left[ {\begin{array}{*{20}{c}}
{ 6} \\
-7
\end{array}} \right] $
4 )
$A' = \left[ {\begin{array}{*{20}{c}}
{ -4} \\
3
\end{array}} \right] $