# Math Help - Family Sets

1. ## 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) $\bigcap_{I \epsilon A} I$

2. Originally Posted by onemore
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?