Question

ME AJUDEM :( É PRA AMANHÃ

1) determine A n B e A u B, sendo :
A) A={x e n | x > 5} e B = {x e n | x < 7}

B) A={x e z | x > 1} e B = {x e n | x < 3}

C) A = {x e z | x < 10 } e B= {x e n | x < 6}


D) A = {x e N | 2 < x < 5 } e
B = {x e z | 1 < x < 4} ​

Answer 1

a) A = {x E N | x ≥ 5} e B = {x E N | x < 7}

A={5,6,7,8,9,10,11...}

B = {0, 1, 2, 3, 4, 5, 6...}

AUB={0, 1, 2, 3, 4, 5, 6, 7, 8, 9...}

A∩B={5, 6}

b) A = {x E Z | x > 1} e B = {x E Z | x ≥ 3}

A= {2, 3, 4, 5, 6, 7, 8, 9, 10, 11...}

B= {3, 4, 5, 6, 7, 8, 9, 10, 11...}

AUB={2, 3, 4, 5, 6, 7...}

A∩B={3, 4, 5, 6, 7...}

c) A = {x E Z | x < 10} e B = {x E N* | x < 6}

A={...,-2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9...}

B={1, 2, 3, 4, 5...}

AUB={...-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

A^B={1, 2, 3, 4, 5...}

d) A={x E N | 2 < x ≤ 5} e B = {x E Z | 1 ≤ x < 4}

A= {3, 4, 5...}

B={1, 2, 3...}

AUB={1, 2, 3, 4, 5}

A∩B={3}

espero ter ajudado ;-)