# Thread: Intersection of sets problem

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2. ## Re: Intersection of sets problem

Draw five number lines one under another so that their origins are on the same vertical line, and draw $C_1,\dots,C_5$ on them. Then try to guess which points belong to all $C_n$'s.

3. ## Re: Intersection of sets problem

so as we go from 1 to infinity, the lim of n as n goes to infinity is 1/∞=0.

Using this, the union would be CN= [0, 3)

The intersection of CN = [1, 2)

What do you think?

4. ## Re: Intersection of sets problem

I don't see the original problem anymore, so I am not sure. However, I think the right end of $C_n$ was $2+1/n$, so 2 belongs to all $C_n$.