"x" es múltiplo de 9 y además: 50 < x < 90
C.S. = {_______________________________}
C.S. = {_______________________________}
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Respuesta:
C.S. ={63,72,81}
Explicación paso a paso:
Los 10 primeros múltiplos de 9 son: {9,18,27,36,45,54,63,72,81,90}
50 < x < 90
50 < {63,72,81} < 90
C.S. ={63,72,81}