數學 集的問題

若A={1.2.3.4.5.6},B={4.5.6.7.8}.C={2.4.6.8.},,D={3.5},E={5.6},F={4.6}:設X代表任一集,而X包含於A,X包含於B.X不包含於C,問D,E,F各集之中,何集相當於X?

1 Answer

Rating
  • 1 decade ago
    Best Answer

    x belongs to set A and set B.

    therefore, x belongs to the intersection of set A and B

    x belongs to {4,5,6}

    but x does not belong to set C

    =>x belongs to the intersection of {4,5,6} and C'

    x belongs to the set {5}

    x=5

    i.e. x belongs to set D, E ,but not F

Still have questions? Get your answers by asking now.