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**davidciprut** Hi guys I have 3 questions,

1-)(a_{n}) is a sequence that converges to L. How can I prove that any subsequence of (a_{n}) converges to L too?

2-)Where can I post questions of Linear Algebra? There isn't a section like that, maybe Linear Algebra belongs to a specific subject that I don't know?

3-) I am a first year Math student. I need advice from people who already finished University. How can I study? How can I study especially to my Analysis (Inifitesimal Calculus) course? The lecturer's notes aren't always very clear. And sometimes I feel helpless and I write here or ask people. I feel bad every time I get help because I feel that I have to be the one who solve the things. So I will be happy to get suggestions, how to study, or maybe there are good and clear books that someone recommend that would help me study without being dependent on the lecturer's note..

Anyway thanks in advance!