Question

Se A={1,2 e B={3,7,9} , Determine:

a)AxB=
b)BxA=
c)AxA=
d)B²

Answer 1

A={1,2 e B={3,7,9} , Determine:

a)AxB= {(1,3),(1,7),(1,9),(2,3),(2,7),(2,9)}
b)BxA=  {(3,1),(3,2),(7,1),(7,2),(9,1),(9,2)}
c)AxA= {(1,1),(1,2),(2,1),(2,2)}
d)B² = {(3,3),(3,7),(3,9),(7,3),(7,7),(7,9),(9,3),(9,7),(9,9) }