Question

sendo A ={1,2,3,4,5}, B={3,4,5,6,7}, C= 5,6,7,8,9} Determine: A-B e B-C?

Answer 1

Boa noite! Vamos lá:

A = {1,2,3,4,5}
B = {3,4,5,6,7}
C = {5,6,7,8,9} 

A-B = {1,2}
B-C = {3,4}

Espero ter ajudado! :)

Answer 2

A-B {( 1,3) (1,4) (1,5) (1,6)(1,7)(2,3)(2,4)(2,5)(2,6)(2,7)(3,3)(2,4)(3,5)(3,6)(3,7)(4,3)(4,4)(4,5)(4,6)(4,7)(5,3)(5,3)(5,4)(5,5)(5,6)(5,7)