3) Seja M subscript 3 open parentheses straight real numbers close parentheses equals open curly brackets open parentheses table row cell a subscript 11 end cell cell a subscript 12 end cell cell a subscript 13 end cell row cell a subscript 21 end cell cell a subscript 22 end cell cell a subscript 23 end cell row cell a subscript 31 end cell cell a subscript 32 end cell cell a subscript 33 end cell end table close parentheses space divided by space a subscript i j end subscript element of straight real numbers comma space i comma j element of open curly brackets 1 comma 2 comma 3 close curly brackets close curly brackets o conjunto das matrizes de ordem 3 com entradas reais. Considere os seguintes subconjuntos desse conjunto: O equals open curly brackets X element of M subscript 3 left parenthesis straight real numbers right parenthesis divided by space d e t space X equals 1 close curly brackets, P equals open curly brackets X element of M subscript 3 left parenthesis straight real numbers right parenthesis divided by space X to the power of t equals X close curly brackets, Q equals open curly brackets X element of M subscript 3 left parenthesis straight real numbers right parenthesis divided by space X equals open parentheses table row cell a subscript 11 end cell cell a subscript 12 end cell