Question

5 (UFSC – Aberta) - Considere os conjuntos: A = {x ∈ Z/ 1 < x ≤ 17 }, B = {x ∈ IN x/ é ímpar } e C = {x ∈IR 9/ ≤ x ≤ 18 }. Calcule a soma dos elementos de (A ∩ B) − C.

Answer 1

A = { 34,5,6,7,8,9,10,11,12,13,14,15,16,17}
B = { 3,5,7,9,11,13,15,17}
C = { 9,10,11,12,13,14,15,16,17,18}

A∩B - C = { 3,5,7,9,11,13,15,17} - { 9,10,11,12,13,14,15,16,17,18}
              = {3,5,7}
3+5+7= 15