Question

Dado U= {-4,-3,-2,-1,0,1,2,3,4}, sejam A={x E U|x<0}, B= {c E U | -3 < x < 2 } e C = {x E U| x ≥ 1}, determine : a) A U B. b) A U C. c) A U B U C. d) A∩ B ∩ C.

Answer 1

U = {-4, -3, -2, -1, 0, 1, 2, 3, 4}

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

B = {-2, -1, 0, 1}

C = {1, 2, 3, 4}

a) A U B = {-4, -3, -2, -1, 0, 1}

b) A U C = {-4, -3, -2, -1, 1, 2, 3, 4}

c) A U B U C = U = {-4, -3, -2, -1, 0, 1, 2, 3, 4}

d) A ∩ B ∩ C = {} = ∅