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I hope I'm posting in the correct forum. Apparently, I can post questions from grad books in this forum, so I decided to post here!

The topology book I'm using asks me to prove that if ##X## is a second countable topological space, if ##x\in \overline{A}##, then there exists a sequence ##(x_n)## in ##A## converging to ##x##.

I'm pretty lost at how to prove something like this. Any hint would be appreciated.

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# Second Countable spaces

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