Posted by **Lindsay** on Thursday, January 15, 2009 at 11:50am.

Can someone explain to me why the intersection of two infinite sets is not always an infinite set, but the union of two infinite sets is?

- Algebra -
**bobpursley**, Thursday, January 15, 2009 at 11:52am
Take the infinite set (0, odd numbers). Then consider the infinite set (0. even numbers).

The intersection is not infinite, it contains just 0

But the union is infinite, as it contains 0, all odd, and all even

- Algebra -
**Lindsay**, Thursday, January 15, 2009 at 12:01pm
That makes sense. Thank you!

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