Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

Im having trouble with this problem, I dont know where to begin.

Suppose that Ä is a nested family of sets.

1. Prove that U (from k=1 to infite) A(sub k) = A(sub l)

2. Prove that ∩ (from k=1 to n) A(sub k) = A(sub n)

Thanks in advace mathematicians!

-William

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# Nested Familiy

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