Question

(CEFET MG – Adaptada) Seja A = { xϵ R tal que 1 ≤ x ≤ 3 } e B = { x ϵ R tal que 2 ˂ x ≤ 7}. Determine B – A.

Answer 1

A = {1,2,3}
B = {3,4,5,6,7}
B - A = {4,5,6,7}