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1. Find the interior, the boundary, the set of all accumulation points, and the closure of each set. Classify it as open, closed, or neither

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1. Find the interior, the boundary, the set of all accumulation points, and the closure of each set. Classify it as open, closed, or neither open nor closed. Is it a compact subset of B? c. C = 1+ (-1)" :nEN intC = bdC = C = C is closed / open / neither closed nor open C is compact / not compact

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