Question

seja A={-2, -1, 0, 2, 4} e B={-1, 0,1,4}, determine: A ∩ B; A U B; A - B; B - A

Answer 1

A = {-2,-1,0,2,4} 
B = {-1,0,1,4}

A ∩ B = {0,-1,4}
A U B = {0,1,-1,2,-2,4}
A - B = {-2,2}
B - A = {1}

Espero ter ajudado.