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Math Help - Family Sets

  1. #1
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    Family Sets

    Let A be the family of closed intervals that contains 0 and are contained in (-1,1). Thus I is in A if and only if I = [a,b], where -1<a<0<b<1. Determine the following sets and justify you answers:

    (a)  \bigcup_{I \epsilon A} I

    (b)  \bigcap_{I \epsilon A} I
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  2. #2
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    Quote Originally Posted by onemore View Post
    Let A be the family of closed intervals that contains 0 and are contained in (-1,1). Thus I is in A if and only if I = [a,b], where -1<a<0<b<1. Determine the following sets and justify you answers:
    (a)  \bigcup_{I \epsilon A} I
    (b)  \bigcap_{I \epsilon A} I
    Are you going to show any effort on this?
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