Question: Could Someone please help me with this problem 1. Prove that a is an accumulation point of a set S iff there exists a sequence

Could Someone please help me with this problem

1. Prove that a is an accumulation point of a set S iff there exists a sequence (Sn ) of points in S\\ {are } such that (Sn) converges to a . o ( = ) a is an accumulation point of a set S = there exists a sequence (Sn) of points in S\\x} such that (Sn) converges to c . o (

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