4 . Let
� 1 3� ��
� � 2 2
T � � �. � 3 1 �
� � � � 2 2 �
( a ) Describe the transformation represented by T .
( b ) T transforms the point P to the point ( � 2 , 2 3 ) . Find the coordinates of P .
( c ) Write down the smallest positive integer n such that identity matrix .
T n � I , where I is a 2� 2
[ 1 ]
[ 3 ]
[ 2 ]
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