Respostas

  • Usuário do Brainly
2014-06-23T14:57:11-03:00
A) {2,4,6,8}
{2}, {4}, {6}, {8}, {2,4}, {2,6}, {2,8},{4,6}, {4,8}, {6,8},{2,4,6,8}

b)  {-1,1,2}
{-1}, {1}, {2}, {-1,1}, {-1,2}, {1,2}, {-1,1,2}

c)
{1,2}
{1}, {2}, {1,2}