Question

Sabendo que A={-2, 3} e B={1, 3, -1}, determine:
a) A×B
b) A×A
c) B×A
d) B×B

Answer 1

Resposta:

a)A×B={-2, 3} × {1, 3 ,-1}

= {-2×1, 3×3-1}

={-2 , 8}

b)A×A={-2, 3} × {-2 ,3}

={-2×-2 , 3×3}

={4 , 9}

c)B×A={1 , 3,-1} × {-2,3}

={1×-2, 3×3-1}

={-2 , 8}

d)B×B={1 , 3, -1} × {1 ,3 , -1}

= {1×1 , 3×3, -1×-1}

{1 , 9, 1}