Question

11) Sendo A = { 3, 4, 5, 6, 7} e B = {5, 6, 7, 8, 9}, determine: a) A  B b) A ∩ B .

Answer 1

A = {3, 4, 5, 6, 7}

B = {5, 6, 7, 8, 9}

a) A U B = {3, 4, 5, 6, 7} U {5, 6, 7, 8, 9}

= {3, 4, 5, 6, 7, 8, 9}

b) A ∩ B = {3, 4, 5, 6, 7} ∩ {5, 6, 7, 8, 9}

= {5, 6, 7}