Infinite union & infinite intersection

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amit28it: Senior | Next Rank: 100 Posts; Posts: 82; Joined: Fri Nov 04, 2011 12:35 amFollowed by: 2 members

by amit28it » Tue Nov 15, 2011 5:25 am

I don't quite understand the meaning of "infinite union" and "infinite intersection".

Is an infinite union
âˆž
U Ak
k=1

being defined as a limit

lim (A1 U A2 U ... U An) ???
n->âˆž

How about an infinite intersection?

Thanks!

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Source: Beat The GMAT — Problem Solving | Tue Nov 15, 2011 5:25 am

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