All Junior Cert Mathematics posts
  • avatar image

    Help with sets Katrina.khod

    Hello, I do not understand sets at all. Can somebody please explain or give notes to me.

    Thanks so much

    Happy new year

    1. avatar image

      K1234

      A set is a well defined collection of objects e.g. The set of whole numbers between 1and 5 is a well defined set but the set of good actors is not. Different people will give different answers.

      Two sets are equal is they contain the exact same elements.

    2. avatar image

      K1234

      If E= { the first five letters in the alphabet} then:

      d is an element of E but y is not an element of E.

      The set from which all others are being considered is called the universal set, U.

      If every element of set E is also an element of set F then E is said to be a subset of F.

      The union of two sets is found by putting together in a new set all the elements of E and F without repeating an element.

      The intersection of two sets E and F is the set of elements found in both E and F.

      The complement of set E is the set of elements in the universal set U which are not in E. It is written as E'.

      The book of formulae and tables has some set symbols.

    3. avatar image

      Katrina.khod

      Thank you so much

      It helped a lot

    4. avatar image

      AJRH

      k

    5. avatar image

      Me

      Share files from your computer
      loader

Going to College