Question

Dados os conjuntos A = {1, 2, -1, 0, 4, 3,
5} e B = {-1, 4, 2, 0, 5, 7} determine:
a) A U B =
b) B - A
c) A ∩ B =
d) (A ∩ B) ∩ A

Answer 1

a) AUB= {1,2,-1,0,4,3,5,7}
b) B-A= {7}
c) A∩B={-1,4,2,0,5}
d)(A∩B)∩A={-1,4,2,0,5}

Answer 2

A = {1, 2, -1, 0, 4, 3, 5}
B = {-1, 4, 2, 0, 5, 7} 

a) A U B =   { 1, 2, -1, 0, 4, 3, 5,7 } 
b) B - A =  { 7 } 
c) A ∩ B =  { -1, 0, 2, 4, 5} 
d) (A ∩ B) ∩ A =  { -1, 0, 2, 4, 5}  ∩ {1, 2, -1, 0, 4, 3, 5} =  { -1, 0, 2, 4, 5 }