Question

ayuuudaaa.............................​

Answer 1

Respuesta:

$A\times B=\left\{\left(x,\:4\right);\left(x,\:5\right);\left(x,\:6\right);\left(x,\:7\right);\left(y,\:4\right);\left(y,\:5\right);\left(y,\:6\right);\left(y,\:7\right)\right\}$