題組內容
3 (20) Suppose that \( f: M \to N \) is continuous and \( B \subseteq M \) is compact. Then
a. Prove that \( f(B) \) is compact.
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3 (20) Suppose that \( f: M \to N \) is continuous and \( B \subseteq M \) is compact. Then
a. Prove that \( f(B) \) is compact.