T?p con c?a t?p h?p A là t?p h?p g?m các ph?n t? ??u là ph?n t? c?a t?p h?p A.(commence array l A subset B Leftrightarrow forall x in a very Rightarrow x in BA notsubset B Leftrightarrow exists x in the Rightarrow x notin Bstop array )T?t C?two hundred ?? Thi Th? T?t Nghi?p THPT 2025 L?ch S?L?ch S? L?p 12L?ch S? L?p 11L?ch S? L?p 10L?ch S? 9L?ch