
Hello,
I have the following question and I would really need help finding the examples they are looking for. I can prove the rest but I’m never good at finding examples.
Thanks!

Hello,
I have the following question and I would really need help finding the examples they are looking for. I can prove the rest but I’m never good at finding examples.
Thanks!
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(a): $I_n=[n, \infty)$.
(b): $I_n=(0, \frac{1}{n})$.