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Homework Help: Unfamiliar Notation

  1. Jan 26, 2010 #1
    1. The problem statement, all variables and given/known data

    Having trouble recognizing this notation.
    Let Ai = {i, i + 1, i + 2, . . . } for i = 1, 2, . . . . What

    [tex]\bigcup[/tex] A (subscript i)


    [tex]\bigcap[/tex] A (subscript i)

    2. Relevant equations
    I know what the [tex]\bigcup[/tex] or [tex]\bigcap[/tex] notation means in sets and subsets, but not in sequences and summations.

    3. The attempt at a solution

    I don't need it explained, I simply need to know what the [tex]\bigcup[/tex] and [tex]\bigcap[/tex] stands for so I can read up on them. Thanks guys. I can also upload the pdf attachment if needed.
    Last edited: Jan 26, 2010
  2. jcsd
  3. Jan 26, 2010 #2


    Staff: Mentor

    [tex]\bigcup[/tex] - union - A1 U A2 U ... U An
    [tex]\bigcap[/tex] - intersection - same as above but with the intersection symbol
  4. Jan 26, 2010 #3
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